if you can fill out this worksheet 100 pts! only 5 questions, about stoichiometry PLEASE HELP ASAP!!
Answers
Given: NaOH, H₂SO₄. Wanted: Na₂SO₄.
Percent yield = (325 g / 355.1 g) × 100 = 91.5%
molar mass of Na₂SO₄ is 142.04 g/mol.
The mole ratio needed is 2:1 (two moles of NaOH react with one mole of H₂SO₄ to produce one mole of Na₂SO₄).
The molar mass of Na₂SO₄ is 142.04 g/mol.
To determine the theoretical yield, we need to first calculate the limiting reagent.
Using the mole ratio, we can calculate the number of moles of H₂SO₄ required to react with 5.00 moles of NaOH:
5.00 mol NaOH × (1 mol H₂SO₄ / 2 mol NaOH) = 2.50 mol H₂SO₄
Since we have 7.00 moles of H₂SO₄, it is in excess and NaOH is the limiting reagent.
The number of moles of Na₂SO₄ that can be produced is:
5.00 mol NaOH × (1 mol Na₂SO₄ / 2 mol NaOH) = 2.50 mol Na₂SO₄
The theoretical yield of Na₂SO₄ is:
2.50 mol Na₂SO₄ × 142.04 g/mol = 355.1 g Na₂SO₄
The percent yield is calculated by dividing the actual yield (325 g) by the theoretical yield (355.1 g) and multiplying by 100:
Percent yield = (325 g / 355.1 g) × 100 = 91.5%
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Related Questions
What is the molarity of a solution of ammonium chloride prepared by diluting 50. 0 mL of 3. 79 M ammonium chloride solution to 2. 0 L?
Answers
The molarity of the diluted ammonium chloride solution is 0.09475 M.
The molarity of the diluted ammonium chloride solution, we can use the equation:
\(M_1V_1 = M_2V_2\)
here \(M_1\) is the initial molarity
\(V_1\) is the initial volume,
\(M_2\) is the final molarity, and
\(V_2\) is the final volume.
\(M_1\) = 3.79 M (from the initial solution)
,\(V_1\) = 50.0 mL = 0.050 L (from the initial solution)
\(V_2\) = 2.0 L (the final volume after dilution)
For \(M_2\) , we get:
\(M_2\) = ( \(M_1\) × ,\(V_1\) ) / \(V_2\)
\(M_2\) = (3.79 M × 0.050 L) / 2.0 L
\(M_2\) = 0.09475 M
Therefore, the molarity of the diluted ammonium chloride solution is 0.09475 M.
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Q2. Keep a potted plant in a closed box with a small hole. Keep this box on a window sill. Open the box
after ten days.
a. What do you notice?
__________________________________________________________________________________
__________________________________________________________________________________
b. Why is this response useful to the plant?
__________________________________________________________________________________
__________________________________________________________________________________
c. Which are the other stimuli, the stem might respond to?
__________________________________________________________________________________
__________________________________________________________________________________
Answers
a. When the box is opened after ten days, you would notice that the plant has grown towards the hole in the box.
b. This response is useful because it allows the plant to maximize its exposure to light for photosynthesis, ensuring its survival and growth.
c. Other stimuli the stem of a plant may respond to include gravity, touch, chemicals, water, and temperature.
a. When the box is opened after ten days, you would likely notice that the plant has grown towards the small hole in the box. The stem of the plant would have elongated and bent to direct its growth towards the source of light.
b. This response of the plant is useful because it demonstrates phototropism, which is the plant's ability to respond and grow towards a light source.
By growing towards the hole and orienting itself towards the light, the plant is maximizing its exposure to sunlight, which is essential for photosynthesis. Sunlight provides the energy necessary for the plant to produce food and carry out various metabolic processes. Therefore, the plant's response helps it optimize its chances of survival and growth.
c. Apart from light, plants can respond to various other stimuli. Some examples of stimuli to which the stem of a plant may respond include:
Gravitropism: Plants can respond to gravity by orienting their growth in relation to the gravitational force. The stem may grow upwards against gravity (negative gravitropism) or downwards with gravity (positive gravitropism).
Thigmotropism: This is the response of a plant to touch or physical contact. The stem may grow towards or away from a physical support or object it comes in contact with.
Chemotropism: Plants can respond to chemicals in their environment. For example, the stem may grow towards or away from a particular chemical stimulus.
Hydrotropism: This is the response of plants to water. The stem may grow towards a source of water, allowing the plant to access the necessary moisture for survival.
Temperature: Plants can also respond to changes in temperature. For example, the stem may grow towards warmer temperatures or away from extreme heat or cold.
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What is the process of old crust sinking back into the mantle? *
a. earthquake
b. transform boundary
c. seafloor spreading
d. subduction
Answers
Answer:
dddddddddddddd
ddddddddddddddddd
Why should percent yield never be above 100?
Answers
Percent yield is a measure of the efficiency of a chemical reaction and is defined as the ratio of the actual yield of the product obtained in the reaction to the theoretical yield of the product that could be obtained based on stoichiometry, multiplied by 100.
Percent yield is expressed as a percentage, and it is a measure of how much of the reactants were actually converted into the desired product. In a perfect reaction, all of the reactants would be converted into the desired product, and the actual yield would be equal to the theoretical yield. In this case, the percent yield would be 100%.
However, in practice, it is not always possible to achieve a 100% yield due to various factors such as incomplete reactions, side reactions, loss of product during isolation, or impurities in the starting materials. Therefore, percent yield values below 100% are common and are often used to evaluate the effectiveness of a reaction.
The actual yield, on the other hand, is the amount of product that is actually obtained from the reaction. Therefore, by definition, the percent yield cannot be greater than 100%.
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how can you blance it and make it equal on both sides
2H2+o2=2H2o blance it
Answers
Answer:
it have been already balanced
2H2 + O2 = 2H2O.
The activation energy Ea of a reaction is Ea = 43.5Kj.mol. Estimate the variation in the rate k of the reaction when the temperature is raised from 300K to 310K.(R = 8.314 J.K.mol)
Answers
Answer
The variation in the rate k (k1/k2) is 0.5707 s^-1
Step-by-step explanation:
Given the following parameters
Activation energy = 43.5Kj.mol
T1 = 300K
T2 = 310K
R = 8.314 J.Kmol
\(K\text{ =A}e^{-\frac{Ea}{RT}}^{}^{}\)\(\begin{gathered} \text{where K = rate constant},\text{ Ea = Activation energy, R= gas constant and T = temperature} \\ \ln (k)\text{ = }\ln A\text{ - }\frac{Ea}{RT} \\ \text{ A is a constant} \\ \text{ if the reaction occurs at two temperature T1 and T2} \\ \ln k1\text{ = }\ln A\text{ - }\frac{Ea}{RT1}--------\text{ equation 1} \\ \ln k2\text{ = }\ln A\text{ - }\frac{Ea}{RT2}\text{ --------- EQUATION 2} \\ \text{ substracting equation 1 from 2},\text{ we have} \\ \ln (\frac{k1}{k2})\text{ = }-\frac{Ea}{RT1}\text{ + }\frac{Ea}{RT2} \\ \ln (\frac{k1}{k2})\text{ = }\frac{Ea}{R}(\frac{1}{T2}\text{ - }\frac{1}{T1}) \\ \\ \ln (\frac{k1}{k2})\text{ = }\frac{43500}{8.314}(\frac{1}{310}\text{ - }\frac{1}{300}) \\ \ln (\frac{k1}{k2})\text{ = 5232.139 }(0.00322\text{ - 0.003333)} \\ \ln (\frac{k1}{k2})\text{ = 5232.139 (}-\text{ 0.0001071)} \\ \ln (\frac{k1}{k2})\text{ = -0.560851} \\ \text{Take the exponential of both sides} \\ \frac{k1}{k2}\text{ = }e^{-0.560851} \\ \frac{k1}{k2\text{ }}=0.5707s^{-1} \end{gathered}\)please help me with this answer
Answers
The method of seed dispersal of the pea plant happens in a mechanical way when the seeds disperse in different directions in what is known as explosive dispersal.
What is Seed Dispersal?This refers to the movement of seeds through a variety of means from the parent plant.
Hence, we can see that the method of dispersal for the blueberry plant is through the process of suc--kering which occurs when new shoots grow and form new suc--kers from the main root cluster.
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The reaction 2 NO(g) ⇌ N2(g) + O2(g) has a value of Keq = 2400 at a temperature of 2000 K. If 0.570 mol of NO(g) is initially placed in a 3.0 L container, calculate the equilibrium concentrations of each gas
Answers
Answer:
\([N_2]_{eq}=0.094M\)
\([O_2]_{eq}=0.094M\)
\([NO]_{eq}=0.002M\)
Explanation:
Hello,
In this case, for the given chemical reaction, we write the following law of mass action:
\(Keq=\frac{[N_2][O_2]}{[NO]^2}\)
That in terms of the change \(x\) due to the reaction extent (ICE procedure) we can write:
\(Keq=\frac{x*x}{([NO]_0-2x)^2}\)
Thus, the initial concentration of nitrogen monoxide is:
\([NO]_0=\frac{0.570mol}{3.0L} =0.19M\)
Thereby, we write:
\(2400=\frac{x*x}{(0.19-2x)^2}\)
That we can solve by suing the quadratic equation formula or solver to obtain two roots:
\(x_1=0.094M\\x_2=0.096M\)
Nevertheless, the correct answer is 0.094 M since the other root will produce a negative concentration of nitrogen monoxide at equilibrium, therefore, the equilibrium concentrations turn out:
\([N_2]_{eq}=x=0.094M\)
\([O_2]_{eq}=x=0.094M\)
\([NO]_{eq}=0.19M-2x=0.19M-2(0.094M)=0.002M\)
Best regards.
How can you prove that atom is neutral?.
Answers
An electron and a proton have the same quantity of charge, yet they are charged differently.As a result, an atom is said to be electrically neutral if it has an equal number of protons and electrons.
How can the neutrality of an atom be established? An electron and a proton both have charge, but it is of a different kind.As a result, an atom is said to be electrically neutral if its protons and electrons are distributed equally.However, to increase their stability, atoms can gain or lose electrons.Neutral refers to an atom with no charge.Consider this:A neutral sodium atom has an atomic number of 11, which denotes that it has 11 protons and, because it is neutral, 11 electrons.An atom contains an equal amount of positively and negatively charged protons and electrons.There is no net charge on the atom as a result of the equilibrium of the opposing charges.In addition, there are no charges on the neutrons in the atom.An atom is therefore electrically neutral.To learn more about atom refer
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Figure A and Figure B represent examples of different types of chemical bonding. Identify the descriptions and properties that best represent each figure. All of the descriptions and properties may not be used. Figure A Figure B ________ ________
Answer Bank - Na-Clbond - nonpelar covale ionic - CI-CI bond - transder of cloctrom - N-H bond - polar covalent - cual sharing of clectrons - unoqual sharing of electrons
Answers
As for the two different types of chemical bonding illustrated by Figure A and Figure B, they are the Ionic bond and Polar covalent bond. The properties and descriptions that best illustrate each figure are listed below:Figure AIonic BondThe ionic bond involves the transfer of valence electrons from the nonmetal to the metal ion. There is no sharing of electrons in ionic bonding, and the valence electrons in the anion are transferred to the metal cation, creating an ion-pair. This leads to an electrostatic attraction between the anion and cation, which is the ionic bond's fundamental concept.The Na-Cl bond is a prime example of an ionic bond since sodium is a metal, while chlorine is a nonmetal, and the bond between them is ionic.Polar Covalent BondThe polar covalent bond involves unequal sharing of electrons, as opposed to the ionic bond. Electronegativity differences lead to unequal sharing, and if one atom is more electronegative than the other, it attracts electrons closer to it, creating partial negative and positive charges.The N-H bond is a perfect example of a polar covalent bond because the hydrogen atom has a partial positive charge, while the nitrogen atom has a partial negative charge.Figure BNon-polar Covalent BondA non-polar covalent bond occurs when two atoms share electrons equally between them. Both atoms have the same electronegativity; thus, electrons are evenly shared between them.The C-Cl bond is a prime example of a non-polar covalent bond since both atoms have a relatively similar electronegativity, and there is an equal sharing of electrons.Transder of CloctromThere is no such thing as a transder of cloctrom bond. The correct term is transfer of electrons.CI-CI BondCI-CI bond is a covalent bond between two identical chlorine atoms, representing a diatomic molecule. Since the atoms are identical, there is no difference in electronegativity, and electrons are evenly distributed.Polar Covalent BondThe polar covalent bond involves unequal sharing of electrons, as opposed to the ionic bond. Electronegativity differences lead to unequal sharing, and if one atom is more electronegative than the other, it attracts electrons closer to it, creating partial negative and positive charges.The unequal sharing of electrons is best illustrated by the unequal sharing of electrons in the carbon-oxygen bond.
help me out with this? really appreciate it
Answers
what is the trend in dielectric constants for the following solvents? group of answer choices ccl4 > acetone > dmso h2o < acetone < hexane h2o > acetone > hexane dmso > acetone > ccl4
Answers
The answer is DMSO > Acetone > CCl₄ .
An indicator of a substance or material's capacity to store electrical energy is its dielectric constant. It is a measurement of how much an object can hold or concentrate an electric flux.
Dielectric constant is defined mathematically as the ratio of a material's permittivity to the permittivity of free space. It also goes by the name relative permittivity for this reason. It is relative magnetic permeability's electrical equivalent.
here, the dielectric constant of Acetone is 20.7 , CCl₄ ( Carbon tetrachloride) is 2.23 and DMSO ( Dimethyle Sodium Oxide ) is 46.68.
So, the trend in dielectric constant for Acetone, CCl₄ and DMSO is,
DMSO ( 46.68 ) > Acetone ( 20.7 ) > CCl₄ ( 2.23 ) .
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Help with chemistry problem 6 please and how to put values in equation in the brackets underneath of the problem (so I can show my work)
Answers
Answer
449.4 grams
Explanation
The balanced chemical equation of the reaction is;
\(N_2+3H_2\rightarrow2NH_3\)From the balanced chemical equation;
3 moles of H₂ reacted with 1 mole of N₂ to produce 2 moles of NH₃
Molar mass of H₂ = 2.016 g/mol
Molar mass of N₂ = 28.0134 g/mol
Molar mass of NH₃ = 17.031 g/mol
Convert mole to gram using the formula;
\(Mole=\frac{\text{mass}}{\text{Molar mass}}\)For 1 mole N₂
\(\begin{gathered} 1=\frac{\text{mass}}{28.0134} \\ mass=28.0134\text{ grams} \end{gathered}\)For 3 moles H₂
\(\begin{gathered} 3=\frac{\text{mass}}{2.016} \\ m=3\times2.016=6.048\text{ grams} \end{gathered}\)For 2 moles NH₃
\(\begin{gathered} 2=\frac{\text{mass}}{17.031} \\ m=2\times17.031=34.062\text{ grams} \end{gathered}\)We can now calculate, the mass of NH₃ that can be produced from 79.8 grams of H₂ as follows:
From the balanced equation we can say;
6.048 grams H₂ → 34.062 grams NH₃
∴ 79.8 grams H₂ → x grams NH₃
\(\begin{gathered} \text{x grams }NH_3=\frac{34.062\times79.8}{6.048} \\ \text{x grams }NH_3=\frac{2718.1476}{6.048} \\ \text{x grams }NH_3=449.4291667\text{ grams} \\ \text{x grams }NH_3=449.4\text{ grams} \end{gathered}\)Therefore, 449.4 grams of Ammonia is produced if you started with 79.8 grams of Hydrogen.
A lake experiences episodic acidification, in which the pH drops to 5.0. A scientist studying the lake sees trout and perch disappear from the lake over time. What would be a reasonable explanation for the disappearance of these fish
Answers
A reasonable explanation for the disappearance of these fish is the high acidity affecting fish metabolism.
What is the ideal pH for fish?pH is a very important parameter to consider, as it has a direct effect on the metabolism and physiological processes of fish and other aquatic organisms. The pH tolerance range for fish is between 4.0 and 9.0, while the ideal index is between 6.5 and 8.0
With this information, we can conclude that The various fish species differ in terms of the best pH. The pH range between 6.5 – 9.0 is generally recommended for freshwater species. For marine species, the most recommended PH range is between 7.8-8.4.
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please help me with this question as it's really important
Answers
Answer:
(i)
A → CH3CH2CH3 ( Propane )
B → CH3CH(Cl)CH3 ( 2-Chloropropane )
C → No product
D→ CH3CH=CH2 ( 2-propene )
E → CH3CH2COOH ( Propanoic acid )
(ii)
Reagent X → Acidified water [ H+ / H2O ]
Reagent Y → Bromine with Carbon tetrachloride [ Br2 / CCl4 ]
Reagent Z → Sodium hydroxide [NaOH]
How many grams of NaCI are needed to produce 1.0 g of NaNO3
Answers
For 1.0 g of NaNO3, 0.69 g of NaCl are therefore required.
How much sodium is there in 1 gram of NaCl?Our body requires just tiny quantities of sodium (393.4 mg), or one gram of table salt, in typical circumstances. (sodium chloride). In order to create a 1 molar (M) solution, 1.0 GMW of the chemical must be dissolved in 1 liter of water. 58.44 g make up a 1M solution of NaCl.
We must apply the balanced chemical equation for the process in which NaNO3 is created from NaCl to calculate the quantity of NaCl required to make 1.0 g of NaNO3:
NaCl + HNO3 → NaNO3 + HCl
According to the equation, 1 mole of NaCl and 1 mole of HNO3 combine to form 1 mole of NaNO3. Therefore, we must first determine how many moles of NaNO3 there are:
moles of NaNO3 = 1.0 g / 85.00 g/mol = 0.0118 mol NaNO3
Since 1 mole of NaCl reacts with 1 mole of NaNO3, we can calculate the amount of NaCl that is needed:
moles of NaCl = 0.0118 mol NaNO3
mass of NaCl = (0.0118 mol NaNO3) x (58.44 g/mol NaCl) = 0.69 g NaCl
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An all-terrain vehicle drove through a 200-meter mountain trail in 16 seconds. What was its average speed? please explain
Answers
According to the given conditions, the average speed of vehicle is 12.5 meters/second.
What is average speed?The average speed is the total distance traveled by the object in a particular time interval. The average speed is a scalar quantity. It is represented by the magnitude and does not have direction.
The formula for average speed is found by calculating the ratio of the total distance traveled by the body to the time taken to cover that distance.
The average speed equation is articulated as:Total Distance traveled/Total Time taken which on substitution gives 200/1=12.5 meter/seconds.
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Please someone figure these out for me
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A replacement reaction is one wherein a set of atoms is replaced by another atom in a molecule. In the given reactions is 2Na + Cl₂ → 2NaCl is not a replacement reaction.
What is displacement reaction?A displacement reaction also known as a replacement reaction can be defined as one wherein an atom is displaced by another atom in a molecule. For example, when iron (Fe) is added to a solution of copper sulfate (CuSO₄), it displaces the copper (Cu) metal.
A single replacement reaction can be described as a kind of redox reaction when an element moves out of a compound, one element is replaced by the other in its own compound.
\(A +BC\longrightarrow AB +C\)
Double replacement reactions take place mostly in aqueous solutions wherein the ions precipitate and the exchange of ions occurs. The double replacement reaction can be represented as:
\(AB +CD\longrightarrow AC +BD\)
Therefore, option (D) is correct.
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∴ The processes of nitrate reduction (nitrate respiration) and nitrogen fixation, both mediated by bacteria, are essential to life on Earii. in üis scenario, a bacteriophage has mutated and possesses the ability to spread rapidly across the globe. This t acteriophage is specific for nitrogen fixing bacteria. As such, tot:1 global N fixation is decreasing and will continue to decrease over a period of five years. After this time there will be no biological N fixation on Earth. Include answers and justification for your answers for the following questions: What 'vould the consequences of this be during the period of five years as the death of N fixers increases and spreads? What would the consequences be that would directly impact humans? How would this possibly impact carbon dioxide emissions from soils?
Answers
The loss of biological nitrogen fixation over a five-year period would have significant ecological and agricultural consequences, directly impacting ecosystems, food production, and potentially exacerbating environmental issues such as carbon dioxide emissions.
The consequences of the decrease in biological nitrogen fixation due to the spread of the bacteriophage over a period of five years would be significant. Here are the potential impacts and consequences:
1. Impact on Ecosystems: Nitrogen fixation plays a vital role in the nitrogen cycle, where nitrogen gas from the atmosphere is converted into a usable form by nitrogen-fixing bacteria. This fixed nitrogen is essential for the growth of plants and other organisms. With the death of nitrogen-fixing bacteria, there would be a reduction in the availability of fixed nitrogen in ecosystems. This could lead to nitrogen deficiency, limiting plant growth and overall productivity in various ecosystems.
2. Impact on Food Production: Nitrogen is a critical nutrient for plant growth and is often supplemented through nitrogen fixation. A decline in nitrogen fixation would result in decreased availability of nitrogen for crop plants, leading to reduced agricultural productivity. This could result in lower crop yields and potential food shortages, impacting food security for human populations.
3. Increased Reliance on Synthetic Fertilizers: With a decline in natural nitrogen fixation, there would be an increased reliance on synthetic fertilizers to meet the nitrogen requirements of crops. Synthetic fertilizers are manufactured using energy-intensive processes and can have negative environmental impacts, such as contributing to water pollution through runoff and greenhouse gas emissions during production. Increased usage of synthetic fertilizers would exacerbate these environmental issues.
4. Impact on Carbon Dioxide Emissions: Nitrogen fixation is closely linked to the cycling of carbon and nitrogen in ecosystems. Nitrogen availability affects the growth and productivity of plants, which in turn influences the uptake and storage of carbon dioxide through photosynthesis. A decrease in nitrogen fixation would potentially limit plant growth, leading to reduced carbon dioxide uptake by plants. This could contribute to increased atmospheric carbon dioxide levels and exacerbate climate change.
Overall, It is important to note that this scenario assumes a complete absence of biological nitrogen fixation, which is unlikely in reality due to the presence of non-targeted nitrogen-fixing bacteria and other mechanisms of nitrogen input in ecosystems.
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what is given to the patient before and after n2o/o2 sedation
Answers
Before administering nitrous oxide/oxygen sedation, the patient is usually given a detailed explanation of the procedure, including its risks and benefits.
They are also required to sign an informed consent form. The dentist or dental hygienist administering the sedation will check the patient's vital signs and ensure that they are in good health to receive the sedation.
During the procedure, the patient is given a nasal mask that delivers a mix of nitrous oxide and oxygen.
After the procedure, the patient is usually monitored until the effects of the sedation have worn off. The patient is advised not to drive or operate heavy machinery for at least 24 hours after the procedure.
It is also recommended to avoid consuming alcohol or taking medications that may interact with the sedative for a certain period after the procedure.
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The atomic mass of chlorine is 35.453 amu. Which of chlorine's isotopes is more abundant. Chlorine 35 or chlorine 37. Why?
Answers
How are energy and work related? A. Energy is the force needed to do work B. Work times energy is force C. Energy is the capacity to do work D. Work and energy are the same
Answers
Answer:
I believe the answer is A
Explanation:
Work and energy are related because when you work, you cause displacement in the object you are exerting upon. While this happens, you transfer energy between the systems. Both work and energy share the same SI unit, called the joule.
What is the density of a sample of argon gas at 70 ∘C and 866 mmHg ?
1.62 g/L
16.17 g/L
7.92 g/L
1229.16 g/L
Answers
The density of a sample of argon gas at 70 ∘C and 866 mmHg is 1.62 g/L. To solve this question, we'll use the ideal gas law, which relates the pressure, volume, temperature, and amount of a gas.PV = nRT where:
P is the pressure of the gas (in atm)V is the volume of the gas (in L)n is the amount of gas (in moles)R is the ideal gas constant, which is equal to 0.08206 (L·atm)/(mol·K)T is the temperature of the gas (in K)We'll first convert the temperature to kelvin:
70 °C + 273 = 343 K
Now we can use the ideal gas law to calculate the amount of gas in moles:
PV = nRTn
= PV/RT
where:P = 866 mmHg / 760 mmHg/atm
= 1.14 atm
V = unknown
n = unknown
R = 0.08206 (L·atm)/(mol·K)
T = 343 KPlugging in these values and solving for n:
n = (1.14 atm) V / (0.08206 (L·atm)/(mol·K) * 343 K)n
= 0.042 V
Now we can calculate the density of the gas using the equation:
density = (mass of gas) / (volume of gas)density
= (n * molar mass of Ar) / V
where the molar mass of argon (Ar) is 39.95 g/mol. We can rearrange this equation to solve for V:
density * V = n * molar mass of Ar
V = n * molar mass of Ar / density
Plugging in the known values:density = 1.14 g/L
molar mass of Ar = 39.95 g/moln
= 0.042 VV = n * molar mass of Ar / densityV
= (0.042 mol) * (39.95 g/mol) / (1.14 g/L)V = 1.47 L
Finally, we can calculate the density:density = (n * molar mass of Ar) / V
density = (0.042 mol) * (39.95 g/mol) / (1.47 L)
density = 1.62 g/L
Therefore, the density of a sample of argon gas at 70 ∘C and 866 mmHg is 1.62 g/L.
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Stacy made the following table to compare the functions of plant and animal structures, but she is missing a row title. Which of the following would best replace the X?
a table comparing the functions of different animal and plant structures. There is an unknown 'X' in the table. The skeleton in animals and the stem in plants provide support. The fur in animals and the waxy covering in plants provide protection. The ovaries in animals and the pistil in plants make 'X'
Answers
Answer:
female reproductive structures
What products are formed when a hydrocarbon combusts?
A. Hydrogen and oxygen
B. Carbon dioxide and water
C. Carbon dioxide and hydrogen
D. Water and hydrogen
Answers
Answer:
b
Explanation:
The products are formed when a hydrocarbon combusts are carbon dioxide and water and the correct option is option B.
Combustion is a chemical reaction that occurs when a fuel combines with an oxidizing agent, typically oxygen, resulting in the release of heat and the formation of products. It is an exothermic reaction, meaning it releases energy in the form of heat and light.
During combustion, the fuel undergoes rapid oxidation, breaking its chemical bonds and forming new bonds with oxygen. Common examples of combustion include burning of wood, gasoline, natural gas, and other hydrocarbon fuels.
The reaction is often accompanied by the production of flames and the release of carbon dioxide and water vapor.
Thus, the ideal selection is option B.
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how many moles are in 425g of KNO3?
Answers
Answer:
The answer is 101.1032
Explanation:
The system below was at equilibrium in a
9.0 L container. What change will occur
for the system when the container is
shrunk to 3.0 L?
51.8 kJ + H₂(g) + 1₂(g) = 2HI(g)
Hint: How many moles of gas are on each side?
A. The reactions shifts to the right (products) to produce
fewer moles of gas.
B. There is no change because there are the same
number of moles of gas on both sides.
C. The reactions shifts to the left (reactants) to produce
more moles of gas.
Answers
The number of moles of gas is the same on both sides, the change in volume will not affect the equilibrium position of the reaction. The answer is B) There is no change because there are the same number of moles of gas on both sides.
To determine the change that will occur when the container is shrunk from 9.0 L to 3.0 L for the given reaction:
51.8 kJ + H₂(g) + I₂(g) → 2HI(g)
We need to consider the number of moles of gas on each side of the reaction.
On the left side, there are 2 moles of gas (H₂ and I₂), while on the right side, there are 2 moles of gas (2HI). Both sides have an equal number of moles of gas.
Therefore, the correct answer is B) There is no change because there are the same number of moles of gas on both sides.
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The initial concentration of sodium oxalate, Na₂C₂O4 is 1.34 M. After 19.3 seconds its concentration is
0.276 M
(Triangle)Na₂C₂O4 =
Rate =
Answers
The rate of change of the concentration of Na₂C₂O4 is -0.0551 M/s.
To determine the rate of change of the concentration of sodium oxalate (Na₂C₂O4), we can use the rate equation:
Rate = (Δ[Na₂C₂O4]) / (Δt)
where Δ[Na₂C₂O4] represents the change in concentration of Na₂C₂O4 and Δt represents the change in time.
In this case, the initial concentration of Na₂C₂O4 is 1.34 M, and after 19.3 seconds, the concentration is 0.276 M.
Substituting the values into the rate equation, we have:
Rate = (0.276 M - 1.34 M) / (19.3 s - 0 s)
Rate = (-1.064 M) / (19.3 s)
Rate = -0.0551 M/s
Therefore, the rate of change of the concentration of Na₂C₂O4 is -0.0551 M/s.
The negative sign indicates that the concentration of Na₂C₂O4 is decreasing over time, as the reactant is being consumed in the reaction.
It's important to note that the rate of a reaction is influenced by various factors, such as the reaction mechanism, temperature, and presence of catalysts. The rate can be determined experimentally by measuring the change in concentration of a reactant or product over a specific time interval.
The given information allows us to calculate the rate of change for the specific reaction involving Na₂C₂O4. However, without additional information about the reaction, it is not possible to determine the exact nature or stoichiometry of the reaction, as well as any other reactants or products involved.
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wich group was the control group? The experimental group?
Answers
Answer:looks spicy
Explanation:what are you asking
A molecule contains 3 atoms. It has 1 triple bond and 1 single bond. There are no lone pairs on any of the atoms. How many rheds are within the molecule?.
Answers
The central atom of the molecule has three electrons on its valence shell.
What is the valance shell electro pair repulsion theory?
The valance shell electron pair repulsion theory shows us the number of electron pairs that can be found on the valance shell of the central atom of the molecule. Recall that the shape of the molecule is determined by the number of electron pairs that can be found on the valance shell of the central atom of the molecule.
Hence, given the fact that the molecule contains 3 atoms. It has 1 triple bond and 1 single bond, we can be able to conclude that the molecule has three electron pairs on its valance shell.
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