__ NH3 __O2 --> __ NO2 __H2O The balanced equation shows that 1.00 mol of NH3 requires __ mole(s) of O2.
Answers
The balanced equation shows that 1.00 mol of NH₃ requires 1.5 mole(s) of O₂.
When the given chemical equation is balanced, it becomes as shown below:
4NH₃ + 5O₂ → 4NO₂ + 6H₂O
To balance the above chemical equation, the coefficients were added such that the number of atoms of each element was equal on both sides.
A balanced equation is a chemical equation in which the number of atoms of each element is the same on both sides. The balanced equation shows that 1.00 mol of NH₃ requires 1.5 mole(s) of O₂. This is because of the stoichiometric coefficients in the balanced equation. The coefficients represent the mole ratio of the reactants and products, which is used to relate the amounts of reactants used and products formed in a reaction.
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Related Questions
what more accurate model of the atom emerged from Albert Einstein's contributions and quantum mechanics
Answers
Answer:
Einstein also in 1905 mathematically proved the existence of atoms, and thus helped revolutionize all the sciences through the use of statistics and probability. Atomic theory says that any liquid is made up of molecules (invisible in 1905)
Explanation:
Answer:
The discoveries of Albert Einstein led to development in the understanding of the atom through the study of quantum mechanics and the electron cloud. In this model, there is still a nucleus with protons and neutrons. But unlike the Bohr model, the electrons exist in a cloud outside the nucleus, much like the fruit around the pit of a peach.
Explanation:
The solution in the beaker was a green color. This is an example of
Answers
Answer:
That means its a Transition Metal!
Explanation:
Complete the sentences to explain at what p range the ionization state in the previous part exists Match the words in the left column to the appropriate blanks in the sentences on the right. Reset Help 2.10 4.07 7.40 9.47 protonated deprotonated The ionization state will occur at a pH range of to This ionization state occurs in this range because, when the pH is greater than the pKs (by more than one unit), the compound is at that location. When the pH is less than the pKa. the compound is at that location
Answers
The ionization state will occur at a pH range of 2.10 to 9.47. The ionization state occurs in this range because, when the pH is greater than the pKa, the compound is deprotonated and when pH is less than pKa , the compound is protonated at that location.
Here is how the sentences should be completed to explain at what pH range the ionization state in the previous part exists:pH range of 7.40 to 9.47.The ionization state will occur at a pH range of 7.40 to 9.47.This ionization state occurs in this range because when the pH is greater than the pKs (by more than one unit), the compound is at that location.
When the pH is less than the pKa, the compound is protonated, and when the pH is greater than the pKa, the compound is deprotonated.Ionization state is the state of a chemical compound with ionizable functional groups when an atom or molecule loses or gains electrons.
To form a cation, an atom or molecule loses electrons, while to form an anion, an atom or molecule gains electrons.
The complete question is given below:
Complete the sentences to explain at what p range the ionization state in the previous part exists.
Match the words given below to the appropriate.
Reset Help: (2.10, 4.07, 7.40, 9.47, protonated, deprotonated)
The ionization state will occur at a pH range of ____ to _____. This ionization state occurs in this range because, when the pH is greater than the pKs (by more than one unit), the compound is ______ at that location. When the pH is less than the pKa. the compound is ______ at that location
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help picture down below
Answers
2.508 J of heat is required to raise the temperature of 10.0 g of water from 20 C to 80 C.
Thus, The specific heat capacity of water is 4.187 kJ/kgK, that of ice is 2.108 kJ/kgK, and that of water vapor (steam) is 1.996 kJ/kgK.
This measure of heat required to raise the temperature of a certain substance in a particular state by one degree Celsius.
The amount of heat per unit mass needed to increase the temperature by one degree Celsius or Kelvin is known as the specific heat. The amount of material has no bearing on this quantity.
Ice, water, and steam are substances that represent the several states of matter; specifically, ice stands in for the solid state, water for the liquid state, and steam for the gas state.
Thus, 2.508 J of heat is required to raise the temperature of 10.0 g of water from 20 C to 80 C.
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Why don't incoming ocean waves bring more water on to the shore until the
beach is completely submerged?
Answers
during oxidative phosphorylation, which answer choice best describes how electrons move?
Answers
During the oxidative phosphorylation, the electrons move is the correct option is a) Through electron transport chain.
In the oxidative phosphorylation the electrons will flow through the electron transport chain. The electrons will passes to the oxygen, which will combines with the protons to form the water. The electrons will move through the electron transport chain from the higher energy to the lower energy state. The energy that is release will moves the protons through the channels in membrane proteins, and moving it into the inner space of membrane .
Thus, the electrons move through the electron transport chain during the oxidative phosphorylation.
This question is incomplete, the complete question is :
During oxidative phosphorylation, which answer choice best describes how electrons move?
a) Through electron transport chain
b) Through electron carrier
c) Both a and b
d) None of the above
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. When a newspaper is left in direct sunlight for a few days, the paper begins to turn yellow. The yellow
color is evidence of a
a physical property b, chemical property
c. physical change d. chemical change
4. What describes matter based on its ability to change into new matter with different properties?
a. A chemical change
b. A physical property
c. A chemical property
d. A physical changE
Answers
Physical Change
It is being changed by the sun
Determine the empirical formula of a compound that is 68. 42% cr and 31. 58% o by mass.
Answers
Cr2O3 is the empirical formula of a compound that is 68.42% Cr and 31.58% O by mass.
The masses in grams are pretend percentages: 68.4 g Cr 31.6 g ODivide both by the periodic table mass to get the moles: 68.4gCr/51.996=1.316 mol Cr 31.6gO/16.00=1.975 mol OThe lesser quantity (1.316 is less than 1.975) should be used to divide the two mole values: Cr 1.316/1.316=1 O 1.975/1.316=1.5Since 1.5 is not a whole number, and multiplying 0.5 by 2 gets rid of the decimal, multiply both values by 21 Cr (2)=21.5 O (2)=3The subscripts are Cr2O3.
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Why will goats protect wildfires
Answers
Explanation:
The goats can stretch their necks up to 7 feet, biting branches and low lying leaves. They eat poison oak and can clear rocky cliffs -- something other livestock can't do. And it's easier to control where the goats cut a fire break, unlike controlled burns -- another method of removing wildfire fuel.
pls mark me branilestA carbon atom has six protons, six neutrons, and six electrons. How would a Bohr model show the protons in a carbon atom?
A) The particles are evenly distributed through the mass of carbon.
B) Electrons from a cloud around a nucleus of protons and neutrons.
C) Neutrons revolve around a nucleus of electrons and protons.
D) Electrons move in fixed orbits around a nucleus of protons and neutrons.
Answers
Answer:
D
Explanation:
The Bohr model show the protons in a carbon atom using the model; "Electrons move in fixed orbits around a nucleus of protons and neutrons."
According to Bohr's model of the atoms, the Rutherford model is basically correct. This implies that Bohr model accepts the idea of a nucleus containing nucleons(protons and neutrons).
In addition, the model also postulates that electrons are found in fixed orbits. These fixed orbits are called energy levels or shells.
A graphic description of this is shown in the image attached to this answer.
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how many grams of k o h are needed to neutralize 12.6 ml of 0.14 m h c l in stomach acid?
Answers
0.0989 grams of KOH is needed to neutralize 12.6 mL of 0.14 M HCl in stomach acid.
Volume of HCl solution = 12.6 mL = 0.0126 L
The concentration of HCl solution = 0.14 M We have to find the amount of KOH required to neutralize the given volume and concentration of HCl.
In order to calculate the amount of KOH, we need to first calculate the number of moles of HCl using the formula of Molarity;
Molarity = (Number of moles of solute) / (Volume of solution in liters)0.14 M = n(HCl) / 0.0126L0.14 × 0.0126 = n(HCl)n(HCl) = 0.001764 moles of HCl
Now, the balanced chemical equation for the reaction of KOH with HCl is;KOH + HCl → KCl + H₂OOne mole of KOH reacts with one mole of HCl.
Therefore, the number of moles of KOH required to neutralize the given amount of HCl would be equal to 0.001764 moles. Now, let's calculate the amount of KOH in grams.
Molar mass of KOH = 39.1 + 16.00 + 1.008 = 56.108 g/mol0.001764 moles of KOH would weigh = 0.001764 × 56.108 = 0.0989
hence, the amount of KOH required to neutralize the given volume and concentration of HCl would be 0.0989 grams.
Thus, 0.0989 grams of KOH is needed to neutralize 12.6 mL of 0.14 M HCl in stomach acid.
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How many grams does 4.3 x 10^24 molecules of H2O weigh?
Answers
To get the mass for these molecules, we will need to do three steps:
1 - convert from number of molecules to number of moles.
2 - calculate the molar mass for H₂O.
3 - use it to convert from number of moles to mass.
To convert from number of molecules to number of moles, we need to divide the number of molecules by the Avogadro's number:
\(\begin{gathered} N_A\approx6.02\times10^{23}mol^{-1} \\ n_{H_2O}=\frac{N_{H_2O}}{N_A}=\frac{4.3\times10^{24}}{6.02\times10^{23}mol^{-1}}=0.71428\ldots\times10^1mol=7.1428\ldots mol \end{gathered}\)Now, to calculate the molar mass of H₂O, we need the molar masses of H and O, which we can get on a periodic table:
\(\begin{gathered} M_H=1.00794g\/mol \\ M_O=15.9994g\/mol \\ M_{H_2O}=2\cdot M_H+1\cdot M_O \\ M_{H_2O}=(2\cdot1.00794+1\cdot15.9994)g\/mol \\ M_{H_2O}=(2.01588+1\cdot15.9994)g\/mol \\ M_{H_2O}=18.01528g\/mol \end{gathered}\)Using it, we can convert the number of moles to mass:
\(\begin{gathered} M_{H_{2}O}=\frac{m_{H_2O}}{n_{H_{2}O}} \\ m_{H_2O}=n_{H_2O}\cdot M_{H_{2}O} \\ m_{H_2O}=7.1428\ldots mol\cdot18.01528g\/mol \\ m_{H_2O}=128.680\ldots g \end{gathered}\)Now, the proper way of approximating this value is to maintain the same number of significant figures as the number of molecules, because we used multiplications and divisions. It has two significant figure, so we need to approximate accourdingly:
\(m_{H_{2}O}\approx130g\)So, there is 128.680... grams or, approximately, 130 grams of water.
how much heat is produced if 7.0 moles of ethane undergo complete combustion?
Answers
The balanced equation for the combustion of ethane, C2H6, is: C2H6 + 3O2 → 2CO2 + 3H2OTo determine how much heat is produced if 7.0 moles of ethane undergo complete combustion, we need to use the balanced equation and the standard enthalpies of formation of the reactants and products.
The standard enthalpy of formation of a compound is the enthalpy change when one mole of the compound is formed from its constituent elements, with all reactants and products in their standard states (usually at 1 atm and 25°C).The standard enthalpies of formation of the reactants and products in the combustion of ethane are:
ΔHf°(C2H6) = -84.68 kJ/mol
ΔHf°(O2) = 0 kJ/mol
ΔHf°(CO2) = -393.51 kJ/mol
ΔHf°(H2O) = -285.83 kJ/mol
Now we can calculate the heat produced by using the difference between the enthalpies of the products and reactants:
2CO2 + 3H2O - (C2H6 + 3O2)
ΔH = 2(-393.51 kJ/mol) + 3(-285.83 kJ/mol) - (-84.68 kJ/mol + 3(0 kJ/mol))
ΔH = -1560.78 kJ/mol
Therefore, if 7.0 moles of ethane undergo complete combustion, the amount of heat produced will be:
-1560.78 kJ/mol x 7.0 mol
= -10,925.46 kJ or -10,925,460 J.
Note that the negative sign indicates that heat is released by the reaction, which is exothermic.
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John needs 6 m of wood to build a diving board. The wood comes in different size packages. Select all the packages John could buy that would meet his needs?
3 pieces at 2000 mm each
4 pieces at 1.5 cm each
6 pieces at 100 mm each
6 pieces at 100 cm each
8 pieces at 200 mm each
Answers
On calculating using conversions, John can select either the package of wood with (a) 3 pieces of 2000mm each or the one with (d) 6 pieces of 100cm each.
On conversion of units from mm and cm to m:
1m = 100cm
1m = 1000mm
Therefore,
Since John requires 6m of wood to build a diving board, using unit conversions:
3 pieces of 2000mm each:
2000mm = 2m = 2m x 3 = 6m
4 pieces of 1.5 cm each:
1.5cm = 0.015m x 4 = 0.06m
6 pieces of 100 mm each:
100mm = 0.1m x 6 = 0.6m
6 pieces of 100 cm each:
100cm = 1m x 6 = 6m
8 pieces of 200 mm each:
200mm = 0.2m x 8 = 1.6m
Result:
The package with 3 pieces wood of 2000mm each equals to 6m of wood.
Similarly, the package with 6 pieces wood of 100cm each equals to 6m of wood.
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f Vx=7.70 units and Vy=−6.00 units, dotermine (a) the magnitude and (b)direction of V
Answers
The direction of V is 39.29° (approx) below the negative x-axis.Hence, the direction of V is 39.29° (approx) below the negative x-axis.
Given that Vx=7.70 units and
Vy=−6.00 units.
We need to determine the (a) the magnitude and (b) direction of V.
Step 1:Let's apply Pythagoras theorem to find the magnitude of V.
It is given that, Vx=7.70 units and Vy=−6.00 units.
By Pythagoras theorem, we have,
V = √Vx2 + Vy2V
= √(7.70)2 + (−6.00)2V
= √(59.29) V = 7.70 units (approx)
Therefore, the magnitude of V is 7.70 units (approx).
Step 2:Let's determine the direction of V.Since Vx=7.70 units is positive and Vy=−6.00 units is negative.
Therefore, the vector V lies in the fourth quadrant.In the fourth quadrant, tanθ = Vy/Vxtanθ
= (-6.00) / (7.70)tanθ
= - 0.77922θ
= tan-1 (-0.77922)θ
= -39.29°
The direction of V is 39.29° (approx) below the negative x-axis.Hence, the direction of V is 39.29° (approx) below the negative x-axis.
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PLESE HELP! Which of the following sugar solutions is the most concentrated?
Select one:
a. 25 g of sugar in 60 mL of water
b. 2 g of sugar in 100 mL of water
c. 15 g of sugar in 25 mL of water
d. 12 g of sugar in 30 mL of water
Answers
c.15gof in25mlof wather
The sugar solution that is the most concentrated is 15 g of sugar in 25 mL of water.
CONCENTRATION:
The concentration of a solution is related to the amount of a substance and its volume. The concentration of a solution is directly proportional to the amount of a substance but inversely proportional to the volume. This means that the concentration increases with an increasing amount of substance but decreases with an increasing volume. According to this question, 15g of sugar is the highest amount and it dissolves in 25mL of water, which is the lowest volume. Therefore, it is the most concentrated sugar solution.Learn more at: https://brainly.com/question/202460?referrer=searchResults
A scientist fills two test tubes with different aqueous solutions and adds different compounds to each solution. After the reactions are complete, the scientist measures the temperature of each solution. The table shows the results of the experiment.
Test Tube1 Test Tube2
Initial Temperature 20°C | 20°C
Final Temperature
25°C | 19°C
Which statement best explains the results?
A. The products in test tube 1 have a lower potential energy than the products in test tube 2.
B. The reaction in test tube 1 has a higher activation energy than the reaction in test tube 2.
C. Test tube 1 has a catalyst, and test tube 2 does not.
D. The reaction in test tube 1 is exothermic, and the reaction in test tube 2 is not.
Answers
Answer:
D. The reaction in test tube 1 is exothermic, and the reaction in test tube 2 is not.
Explanation:
just took it
The option that best explains the result is option D. That is, the reaction in test tube 1 is exothermic, and the reaction in test tube 2 is not.
Change in chemical reaction:In a chemical reaction, heat is either absorbed or released.
In a reaction where there is absorption of heat from the surrounding is called an endothermic reaction.
While in a reaction where heat is released into the surrounding is called exothermic reaction.
From the experiment, there is increase in temperature, from 20 to 25°C, which shows the release of temperature to the surrounding.
Therefore, the reaction in test tube 1 is exothermic, and the reaction in test tube 2 is not.
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A solution was made using NaOH, the pH of the solution was found to be 11.452. What is the concentration of the hydroxide ion, OH^- in this solution
Answers
Answer:
i think it is 0.002831392
Explanation:
pOH = 14 - 11.452 = 2.548
pOH = -log(OH)
2.548 = -log(OH)
10^(-2548) = 0.002831392
what is the only thing in nature that can be a solid, liquid, or a gas
Answers
The only thing in nature which can exists in all the three states equally is water. Water can easily interchange between gas , liquid or solid.
What is states of matter?There are three states on which matter can exist namely solids, liquid and gas. Solid state of a substance have definite shape, volume and size. In solids, molecules are closely packed and have no space in between to move apart.
In liquids, molecules have some space to move and thus they flow like water thereby have no definite shape but have definite volume. In gases, molecules have negligible intermolecular attraction and thus are far apart. Gas molecules spread over the atmosphere.
Most of the substances are usually exists any one of the state but can converted to other states. However, in nature, water is exists in all the three states as liquid water, water vapor and solid ice
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select the more electronegative element of this pair. a. phosphorus (p) b. antimony (sb)
Answers
The more electronegative element of the pair is antimony (Sb).
Electronegativity is a measure of an atom's ability to attract shared electrons in a chemical bond. Antimony has a higher electronegativity value compared to phosphorus, indicating that it has a stronger pull on electrons when forming chemical bonds.
In the given pair of elements, antimony (Sb) and phosphorus (P), antimony is the more electronegative element. The electronegativity values are as follows:
Antimony (Sb): Electronegativity value of approximately 2.05 (Pauling scale).
Phosphorus (P): Electronegativity value of approximately 2.19 (Pauling scale).
The Pauling scale is a commonly used scale to express electronegativity values. According to this scale, higher electronegativity values indicate a stronger pull on electrons in a chemical bond.
Based on the electronegativity values, we can conclude that antimony has a slightly lower electronegativity compared to phosphorus. Therefore, antimony is considered the more electronegative element in this pair.
When antimony forms chemical bonds, it tends to attract electrons more strongly than phosphorus. This stronger electron-attracting ability of antimony is due to its higher electronegativity.
It implies that antimony has a greater tendency to acquire a partial negative charge in a chemical bond compared to phosphorus.
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Sodium chloride is NaCl, and zinc chloride ZnCl₂. Why are there more chloride ions in the zinc compound?
Answers
Answer:
Zinc chloride (ZnCl2) has more chloride ions compared to sodium chloride (NaCl) because the zinc ion has a +2 charge, while the sodium ion has a +1 charge.
Chlorine (Cl) is a halogen element with a -1 charge when it gains an electron to form an ion. To form a neutral compound, the number of positive and negative charges must be balanced.
In NaCl, the sodium ion has a +1 charge and can only bond with one negatively charged chloride ion, which has a -1 charge. Therefore, the formula for sodium chloride is NaCl, with one sodium ion and one chloride ion.
In ZnCl2, the zinc ion has a +2 charge, and it requires two negatively charged chloride ions, each with a -1 charge, to form a neutral compound. Therefore, the formula for zinc chloride is ZnCl2, with one zinc ion and two chloride ions.
Thus, the reason why there are more chloride ions in the zinc compound is because the zinc ion has a higher charge compared to the sodium ion, and it requires two chloride ions to balance its charge, whereas sodium ion requires only one chloride ion.
how will you confirm the presence of hco3- in baking soda?
Answers
An acid can be added to a solution to indicate the occurrence of sodium bicarbonate.. The acid will convert the bicarbonate ion (HCO−3) ( H C O 3 − ) to carbonic acid (H2CO3) ( H 2 C O 3 ) .
What is sodium bicarbonate used for?An acid used to treat acid indigestion and heartburn is sodium bicarbonate. Your doctor may occasionally recommend that you take bicarbonate of soda to lessen the acidity of either blood or urine.
Is sodium bicarbonate harmful to humans?Although bicarbonate isn't usually considered to be one of the most toxic compounds, excessive exposure can have some adverse health effects, such as sneezing and coughing when a lot of powder has been inhaled.
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Explain which of the two, triethylammonium chloride ((ch3ch2)3n-hcl) or triethylamine ((ch3ch2)3n) is more soluble in water and why
Answers
Triethylamine ((CH3CH2)3N) is less soluble in water than ((CH3CH2)3N•HCl). Compared to the uncharged N atom in triethylamine, the positive charge on the N atom in triethylammonium chloride is more polar.
What is triethylammonium chloride?If your compound is not susceptible to moisture, you should dissolve it in dichloromethane or chloroform before giving it a brief wash in cold water and separating it. Cold water washing reduces the product's water solubility. Triethylamine and HCl (strong acid) are combined to form the salt triethylammonium chloride (weak base).
Chloroform readily dissolves the salt of triethylamine hydrochloride. To produce 93 grammes of crude using triethylamine hydrochloride salt, chloroform is first removed. In order to get a certain acidic pH, it is dissolved in 250 mL of water, cooled to 10 °C, then acidified by adding 10% hydrochloric acid.
Triethylamine ((CH3CH2)3N) is less soluble in water than ((CH3CH2)3N•HCl). Compared to the uncharged N atom in triethylamine, the positive charge on the N atom in triethylammonium chloride is more polar. Enhanced solubility results from greater interactions with water as a result of this increased polarity.
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How much heat must be transferred to 55 g of ice to change the ice's
temperature from -13°C to -5.0°C? (The specific heat capacity of ice is 2.11
J/g.°C)
Answers
Q= m x c x t
M= 55 g
C=2.11
T=8
Which two elements are found in significant amounts (1% or more) in both the Universe and the human body?
Answers
Answer:
hydrogen and helium is the answer.
which two events are apart of the rock cycle
Answers
Answer:
The key processes of the rock cycle are crystallization, erosion and sedimentation, and metamorphism.
Explanation:
mark me brainliest!!
Answer:
Earths heat and hydrological cycle
Explanation:
At archery practice, Vladimir tests a bow and arrow he has recently designed. He is able to accelerate a 24.0-g arrow at an average rate of 70.0 m/s^2. What is the bows average force on the arrow
Answers
Answer: A
1.68 N
Explanation:
F = ma = 0.024(70.0) = 1.68 N
HELPPP!!!
The emission of electromagnetic energy from an atomic nucleus is called_______
decay.
Answers
Gamma decay, type of radioactivity in which some unstable atomic nuclei dissipate excess energy by a spontaneous electromagnetic process. In the most common form of gamma decay, known as gamma emission, gamma rays (photons, or packets of electromagnetic energy, of extremely short wavelength) are radiated.
A Lewis structure is a two-dimensional representation of a molecule that does not necessarily show what shape that molecule would take in three dimensions.
Answers
Answer:
This option is correct
Explanation:
Molecules are expressed in the form of Lewis in order to simplify their expression or chemical study, but this does not mean that they manifest or respect this form in all three dimensions since some are generally unstable, or even in the third dimension, these locations between atoms are respected for the characteristics of their unions.
1. Hummingbirds eat approximately 43.0 g of sugar water per day How many moles of carbon dioxide are released daily by a hummingbird's respiration? C_12H_22O_11 + 12O_2 ------> 12CO_2 + 11H_2O
Answers
Answer:
1.507 moles of CO₂ are released daily by a hummingbird's respiration
Explanation:
The reaction of production of carbon dioxide and water from sugar is:
C₁₂H₂₂O₁₁ + 12O₂ → 12CO₂ + 11H₂O
Where 1 mole of sugar produce 12 moles of CO₂
Molar mass of sugar (To convert the mass to moles) is:
12C = 12ₓ12.01g/mol = 144.12g/mol
22H = 22ₓ1.01g/mol = 22.22g/mol
11O = 11ₓ16g/mol = 176g/mol
144.12 + 22.22 + 176 = 342.34g/mol
Thus, moles of 43.0g of sugar are:
43.0g ₓ (1mol / 342.34g) = 0.1256 moles of sugar.
As 1 mole of sugar produce 12 moles of CO₂:
0.1256 moles of sugar ₓ (12 moles CO₂ / 1 mol sugar) =
1.507 moles of CO₂ are released daily by a hummingbird's respiration