Answers
Answer:
C₂H₂O₄
Explanation:
Given parameters:
Mass of organic acid = 5g
Mass of C = 1.334g
Mass of O = 3.554g
Mass of H = 5 - (1.334 + 3.554) = 0.112g
Molar mass = 90.03g/mol
Unknown:
Molecular formula of the compound = ?
Solution:
To solve this problem, we find the empirical formula of the compound first. It is the simplest formula of the compound.
Elements C H O
Mass 1.334 0.112 3.554
Molar mass 12 1 16
Number of moles 1.334/12 0.112/1 3.554/16
0.112 0.112 0.222
Divide by the
Smallest 0.112/0.112 0.112/0.112 0.222/0.112
1 1 2
Empirical formula = CHO₂
The molar mass of this empirical formula = 12 + 1 + 2(16) = 45g/mol
Now;
Multiplication index = \(\frac{90.03}{45}\) = 2
Molecular formula = (CHO₂)₂ = C₂H₂O₄
Related Questions
Why doesn't the red line showing the IR spectrum emitted from the earth's surface match the blue line showing the expected IR spectrum from a 300˚C object?
-Some of the light emitted is used to heat building.
-Molecules in the atmosphere such as CO2 and H2O absorb the radiation.
-Contrails from airplanes absorb the radiation cause the dip at 14 micrometers.
-IR radiation at 14 micrometers is not actually emitted by the earth's surface.
Answers
The red line showing the IR spectrum emitted from the earth's surface does not match the blue line showing the expected IR spectrum from a 300˚C object because:
Molecules in the atmosphere such as CO₂ and H₂O absorb the radiation; option B.What is IR spectroscopy?IR spectroscopy studies Infrared (IR) light in the electromagnetic spectrum.
Sensors are used by thermal detection systems, also known as infrared detection systems, to detect radiation in the infrared region of the electromagnetic spectrum.
In order to create an electronic signal, an infrared camera must first detect the thermal energy or heat, that the scene being seen emits. After processing this signal, an image is created.
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At a temperature of 408K, which gad will have the highest velocity?
Answers
Answer:
1 - NO2 at 339 K
2 - Ne at 371 K
3 - H2 at 371 K
4 - H2 at 425 K
Explanation:
Kinetic Energy is directly related to temperature; the higher the temperature the higher the kinetic energy. Kinetic energy is also equal to 12m⋅v2, so if we want a high velocity we want high temp and low mass. So let's list out approximate masses:
m(H2)≈2
m(NO2)≈46
m(Ne)≈20
So we have NO2 at 339 K, the lowest temperature out of the mix, and the highest mass out of the mix, so this is moving the slowest.
In contrast, we have H2 at 425 K, the highest temperature out of the mix, and the lowest mass out of the mix, so this is moving the fastest.
Now we have Ne and H2 at 371 K, since they are at the same temperature they have the same kinetic energy. But H2 is lighter than Ne so it must be faster. To quantify this mathematically, let's assume (this is wrong but just as an assumption for an example) KE at 371 K is 100:
100=12⋅m⋅v2
200=m⋅v2
√200m=v
So H2 is about v=10 and Ne is about v=√10≈3
So the order to recap is:
1 - NO2 at 339 K
2 - Ne at 371 K
3 - H2 at 371 K
4 - H2 at 425 K
Hope that makes it clearer!
In 2018 Germany ran the first successful test of a fusion reactor shortly after china also ran a successful test imagine that the US begins talks on developing nuclear fusion to begin replacing fossil fuels and nuclear fission reactors as an energy source do u think this is a good idea what would be the pros and cons
Answers
The pros of nuclear energy is the high power output generated while the cons is the damage the waste causes to organisms.
What is Nuclear energy?This process involves the use of nuclear reactions such as fusion and fission to generate electricity.
It produces a high amount of power needed to cover a large population nut the disadvantage is that the waste can alter the genetic composition in organisms thereby resulting in mutation.
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Aqueous hydrobromic acid reacts with solid sodium hydroxide to produce aqueous sodium bromide and liquid water . If of water is produced from the reaction of of hydrobromic acid and of sodium hydroxide, calculate the percent yield of water. Round your answer to significant figures.
Answers
Answer:
See explanation below
Explanation:
You are missing certain data. I found one, in the attached picture. All you have to do is replace your data in this procedure to get an accurate answer.
According to the picture attached, we have 2.4 g of HBr and 1.9 g of NaOH. This mix produces 0.411 g of water. To get the %yield of water, we first need to see how many theorical grams of water are formed. With this we can calculate the %yield.
The overall reaction is:
HBr + NaOH --------> NaBr + H₂O
We have a mole ratio of 1:1 so, let's see which is the limiting reactant between the acid and the base, using the reported molar mass for each (MM HBr = 80.9119 g/mol; MM NaOH = 39.997 g/mol)
moles HBr = 2.4 / 80.9119 = 0.02966 moles
moles NaOH = 1.9 / 39.997 = 0.0475 moles
So, we can clearly see that the moles of NaOH are in excess, so the HBr is the limiting reactant.
As we have a mole ratio of 1:1 with each compound here, and that the HBr is the limiting reactant we can say that:
moles HBr = moles H₂O = 0.02966 moles of water
Now, using the molar mass of water, let's calculate the theorical yield of water: (MM water = 18.01528 g/mol
m H₂O = 0.02966 * 18.01528 = 0.534 g
We have the theorical yield, let's calculate the % yield:
% = 0.411 / 0.534 * 100
% = 76.92%
What is molarity?
A. A measurement of the concentration of a solution.
B. A measurement of the density of a solution.
C. A measurement of the volume of a solution.
D. A measurement of the molar mass of a substance.
Answers
Answer: Molarity is the concentration of a solution expressed as the number of moles of solute per litre of solution
Explanation: Molarity is the concentration of a solution expressed as the number of moles of solute per litre of solution
Answer:
A. A measurement of the concentration of a solution.
Explanation:
The other user was correct. :)
Determine the oxidation numbers of all of the elements in the unbalanced reactions. Then, balance each redox reaction in basic solution. #1 Please!
Answers
1. According to the explanation given in our previous session, in this question we have the following reaction:
MnO4- + C2O42- -> MnO2 + CO2
O = 2-
MnO4- = we have an overall charge of -1, 4 oxygens, therefore we will have -8, and Mn must be = 7+
Mn (reactant) = 7+
C2O42- = overall charge -2, 4 oxygens = -8, therefore carbon must give a final value of +6, since we have 2 carbons, the oxidation number will be +3
C (reactant) = 3+
Mn (products) = 4+
C (products) = 4+
Now for the balanced redox equation:
2 MnO4- + 3 C2O42- + 4 H2O -> 2 MnO2 + 6 CO2 + 8 OH-
Bleach is more basic than egg whites.
Bleach is more basic than egg whites.
Egg whites are more basic than bleach.
Egg whites are more basic than bleach.
Bleach is more acidic than egg whites.
Bleach is more acidic than egg whites.
Egg whites are more acidic than bleach.
Answers
“all elements are produced by all stars” why is this statement not completely true
Answers
It would be more accurate to say that all stars produce some elements, but not all elements are produced by all stars. While it is true that many elements are produced by stars through the process of nuclear fusion, not all elements are created by all stars.
For example, the heaviest elements such as gold and platinum are formed through a process called neutron capture, which occurs during supernova explosions or in the collision of neutron stars.
Additionally, some stars may not be massive enough or may not live long enough to produce certain elements. Therefore, it would be more accurate to say that all stars produce some elements, but not all elements are produced by all stars.
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PS
Calculate the molarity of
10.25g of BaCO3 dissolved
In 250 mL of Solution.
Answers
The molarity of the solution containing 10.25g of BaCO3 dissolved in 250 mL of solution is 0.2984 M.
With examples, how do you determine molarity?Divide the moles of solute by the litres of solution to obtain the molarity. A 0.25 mol/L NaOH solution, for instance, has 0.25 mol of sodium hydroxide per litre of the solution.
First, we need to calculate the number of moles of BaCO3 present in 10.25g:
Molar mass of BaCO3 = 137.33 g/mol (1 Ba atom x 137.33 g/mol + 1 C atom x 12.01 g/mol + 3 O atoms x 16.00 g/mol)
Number of moles of BaCO3 = mass / molar mass = 10.25 g / 137.33 g/mol = 0.0746 mol
Next, we need to convert the volume of the solution from milliliters to liters:
250 mL = 250/1000 L = 0.25 L
Now we can calculate the molarity (M) of the solution:
Molarity = moles of solute / volume of solution
Molarity = 0.0746 mol / 0.25 L
Molarity = 0.2984 M
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Water can be from the stoichiometric hydrogen with oxyger many grams of H20 generated when 45.3 gO 2 reacts with excess hydrogen?
Answers
Answer:
The total grams of H2O generated is 48.159 grams
Explanation:
45.3g of O2 is 1.415 moles.
The molar ratio between O2 and H2 to form H2O is 1:2 as the balanced equations indicates: 2H2 + O2--> 2H2O
Therefore, the moles for hydrogen is 1.415*2 = 2.813
Then, we multiply the moles by the molar mass to get the Mass of Hydrogen: 2.813*1.01=2.859.
Finally we add the weight of 2H2 and O2: 2.869 + 45.3= 48.159g
Physical methods of monitoring the rate of a chemical reaction
Answers
There are several physical methods that can be used to monitor the rate of a chemical reaction are; Spectrophotometry, Conductometry, and Turbidity measurement
Spectrophotometry involves measuring the changes in the intensity of light absorbed or transmitted by a solution during a chemical reaction. Spectrophotometers are used to measure the amount of light absorbed or transmitted by a sample at different wavelengths.
Conductometry involves measuring the changes in electrical conductivity of a solution during a chemical reaction. Conductivity meters are used to measure the electrical conductivity of a solution, which can change as the concentration of ions in the solution changes during a chemical reaction.
Turbidity measurement involves measuring the changes in the clarity or turbidity of a solution during a chemical reaction. Turbidimeters or nephelometers can be used to measure the amount of light scattered by a sample, which can change as particles form or dissolve during a reaction.
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--The given question is incomplete, the complete question is
"What are the physical methods of monitoring the rate of a chemical reaction?"--
The irreversible isomerization A
B was carried out in a batch reactor and the following concentration time data were obtained:
Time vs Concentration data in a Batch reactor
t 0 3 5 8 10 12 15 7.5
mol/h 4 2.89 2.25 1.45 1.0 0.65 0.25 0.07
Determine the reaction order,
, and the specific reaction a rate constant, k, using any method of your choice.
Answers
The reaction order and specific reaction rate constant can be determined by performing the kinetics experiment on irreversible polymerization A. Kinetic experiments can be used to investigate the rate and mechanism of chemical reactions. Chemical kinetics is the study of chemical reactions' speed and pathway.
The term "kinetics" refers to the study of reaction rates, which are determined by measuring the concentration of reactants and products as a function of time.Kinetics experiments can be used to determine the reaction rate and order of reaction. A chemical reaction's rate is defined as the change in the concentration of a reactant or product per unit time. The order of a reaction refers to the number of molecules that must react to produce a product. The order of reaction can be determined by measuring the initial rate of the reaction as a function of concentration.Methods for determining the reaction rate order include the initial rate method, the half-life method, and the integrated rate method. The initial rate method determines the reaction order by measuring the initial rate of the reaction at different reactant concentrations. The half-life method determines the reaction order by measuring the time it takes for the reactant concentration to decrease by half.The integrated rate method determines the reaction order by measuring the concentration of the reactant or product at different times.The specific rate constant can be determined by using the Arrhenius equation, which relates the rate constant to the activation energy, temperature, and frequency factor. The frequency factor can be determined by measuring the rate constant at different temperatures.For such more question on polymerization
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Given the following equation, Na+ + Cl → NaCl, how many grams
of sodium would need to react with 4.5 moles of chloride?
A. 15.6 g
B. 103.5 g
C. 5.1 g
D. 157.55 g
E. 53.5 g
Answers
The right response is B. 103.5 g. The mole ratio of sodium to chloride is 1:1 according to the equation Na+ + Cl NaCl. Since 4.5 moles of chloride are provided, the equation requires 4.5 moles of sodium to be balanced. We must utilise the molar mass of sodium, which is 22.99 g/mol, to get the mass of sodium.
We obtain 103.5 g of sodium by multiplying 4.5 moles of sodium by 22.99 g/mol. The correct response is B. 103.5 g.
The equation requires 1 mole of sodium for every mole of chloride, giving 4.5 moles of sodium and 103.5 g.
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What is the total volume of gases produced at 1092 K and 1.00 atm pressure when 320 g of ammonium nitrite undergoes the following decomposition reaction? NHANOz(s) --> Nz(g) + 2H,O(g) 4x22.4L 22.4L 20x22.4L 5x224L 60x22.4L
Answers
The total volume of gas produced at 1092 K and 1 atm is 34136.61 L.
The balanced chemical reaction for the above reaction is given as,
NaNO₃ → NaNO₂ + O₂
By ideal gas equation,
PV = nRT
where,
P is pressure, V is volume, n is no. of moles, R is gas constant and T is the temperature in Kelvin.
n = given mass / molecular mass
n = 320 / 85 = 3.76
Substituting the values in the equation we get,
1 × V = 3.76 × 8.314 × 1092
⇒ V = 34136.61 L
Hence, the volume is 34136.61 L.
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A substance's density is known to be
5.6 g/mL. You have a 25.0mL sample of the
substance. What is the mass of the sample?
Answers
Answer:
140
Explanation:
do cross multiple the two mL cancel out each other and you are left with 140
Does anyone know Chemistry
Answers
Answer:
so so
Explanation:
this your question?? <_>
How much carbon dioxide is released when it is fully combusted with 4Kg of ethanol with more than enough oxygen? How do you work it out?
Answers
Answer:
7.640 kg
Explanation:
Step 1: Write the balanced complete combustion equation for ethanol
C₂H₆O + 3 O₂ ⇒ 2 CO₂ + 3 H₂O
Step 2: Calculate the moles corresponding to 4 kg (4000 g) of C₂H₆O
The molar mass of C₂H₆O is 46.07 g/mol.
4000 g × 1 mol/46.07 g = 86.82 mol
Step 3: Calculate the moles of CO₂ released
86.82 mol C₂H₆O × 2 mol CO₂/1 mol C₂H₆O = 173.6 mol CO₂
Step 4: Calculate the mass corresponding to 173.6 moles of CO₂
The molar mass of CO₂ is 44.01 g/mol.
173.6 mol × 44.01 g/mol = 7640 g = 7.640 kg
Mangrove trees grow in swampy areas and have strong roots that hold the soil in place. How is this helpful for the environment?
a
They absorb water from the soil.
b
They overtake the environment.
c
They provide wood for humans.
d
They protect the land from eroding
Answers
Mangrove trees' robust roots aid in stabilizing the soil and preventing soil erosion. This is especially crucial in swampy coastal locations, where the soil is frequently loose and prone to wind and wave erosion. Mangrove trees work to stabilize the coastline and stop land erosion by securing the soil in place.
Mangrove trees also aid in removing contaminants from the water, enhancing the quality of the water in coastal areas while serving as an essential home for a variety of wildlife species. Mangrove trees contribute significantly to environmental protection and are an essential component of coastal ecosystems.
Mangrove trees are crucial for environmental preservation because they hold the soil in place and stop erosion in marshy coastal areas. They also provide crucial habitats for numerous wildlife species, stabilize the coastline, and stop the land from being lost to erosion while enhancing water quality by filtering pollutants from the ocean.
Mangrove trees are an essential part of coastal ecosystems overall, and preserving them is essential for preserving a healthy and sustainable environment.
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why are all the differnent parts of the cell necesary
Answers
They are all necessary because without them the cell would not be able to live.
If 20.0 kilocalories of energy were added to 80.0 g of water, what change in temperature would be observed?
Please explain how.
Answers
Answer:
250 °C.
Explanation:
From the question given above, the following data were:
Heat (Q) required = 20.0 kilocal
Mass (M) of water = 80 g
Change in temperature (ΔT) =.?
Next, we shall convert 20.0 Kilocalories to calories. This can be obtained as shown below:
1 kilocal = 1000 Cal
Therefore,
20 kilocal = 20 kilocal × 1000 Cal / 1 kilocal
20 kilocal = 20000 calories
Therefore, 20 kilocalorie is equivalent to 20000 calories.
Finally, we shall determine the change in temperature observed as follow:
Heat (Q) required = 20000 Cal
Mass (M) of water = 80 g
Specific heat capacity (C) of water = 1 Cal /gºC
Change in temperature (ΔT) =.?
Q = MCΔT
20000 = 80 × 1 × ΔT
20000 = 80 × ΔT
Divide both side by 80
ΔT = 20000 / 80
ΔT = 250 °C
Therefore, the change in temperature observed is 250 °C
What is the percent of C in Ca(C2H3O2)2?
(Ca = 40.08 g/mol, C = 12.01 g/mol, H= 1.01 g/mol, O= 16.00 g/mol)
[?]% C
Answers
The percent by mass of the carbon is 30.4%.
What is the percentage of calcium?The term percentage has to do with the ratio of the mass of a particular atom to the total mass of the compound multiplied by one hundred. Thus the first step is to find the total mass or the molar mass of the compound.
Molar mass = 40 + 2(2(12) + 3(1) + 2(16))
= 40 + 2(24 + 3 + 32)
= 40 + 2(59)
= 40 +118
= 158
Thus the mass of carbon is;
4(12)/158 * 100/1
= 30.4%
Thus carbon is only about 30.4% by mass of the compound.
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Which gases contribute more significantly to Global warming
Answers
Answer:
Carbon dioxide
Explanation:
A byproduct of fossil fuel combustion, is the principal greenhouse gas contributing to global warming. However, other greenhouse gases including methane, nitrous oxide, and a number of industrial-process gases also are important contributors to climate change.
What might a peasized gland within the skull be?
salivary gland
pituitary gland
mammary gland
sebaceous gland
Answers
Answer:
Explanation:
pituitary gland
Answer:
B
Explanation:
The pituitary gland is a pea-sized structure that is attached to the undersurface of the brain by a thin stalk.
NaOH + H₂SO4 -> Na2SO4 +H20 balance the equation
Answers
Answer:
2NaOH + H₂SO4 -> Na2SO4 + 2H2O
Explanation:
NaOH + H₂SO4 -> Na2SO4 +H2O
2NaOH + H₂SO4 -> Na2SO4 + 2H2O
Answer:
2NaOH + H₂SO4 -> Na2SO4 + 2H2O
Explanation:
2*H+2H=2*2H
2*Na=Na2
2*O+O4=O4+2*O
s=s
If your equation includes 7(CrO4)2, how many Cr's are there?
If your equation includes 7(CrO4)2, how many O's are there?
Answers
If an equation includes 7(CrO₄)₂, the numbers of Cr's and O's atoms that are there are 14 and 56 respectively.
How to calculate number of atoms?The number of atoms present in a chemical compound can be calculated by multiplying the subscript of the particular element by any coefficient.
According to this question, 7 moles of chromate with the chemical formula; (CrO₄)₂ is given. The number of oxygen and chromium atoms in this compound can be calculated as follows:
Chromium = 7 (coefficient) × 2 = 14 atomsOxygen = 7 (coefficient) × 8 = 56 atomsLearn more about no of atoms at: https://brainly.com/question/14190064
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alcohols are compounds that contain ____. substances are called ketones if they contain a ____ in the center of a hydrocarbon chain
Answers
alcohols are compounds that contain hydroxyl groups (-OH). Substances are called ketones if they contain a carbonyl group (C=O) in the center of a hydrocarbon chain.
Hydroxyl groups (OH) are functional groups consisting of an oxygen atom bonded to a hydrogen atom, typically found on the surface of molecules. They are a type of reactive hydrophilic group, meaning they are attracted to water and will react with other molecules in aqueous solutions to form hydrogen bonds. Hydroxyl groups are important components of many biological molecules, including proteins, carbohydrates, DNA, and lipids. They are also found in many drugs and play a role in drug metabolism.
Carbonyl groups (C=O) are functional groups consisting of a carbon atom double-bonded to an oxygen atom. They are found in many organic compounds, including aldehydes, ketones, carboxylic acids, amides, and esters. Carbonyl groups are highly reactive and undergo a variety of reactions, including nucleophilic addition, reduction, and oxidation reactions. They also play an important role in biological processes, such as photosynthesis and respiration.
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Object A has a molar heat of 31.2 J/mole∙°C and object B molar heat is 11.2 J/mole∙°C. Which object will heat up faster if they have the same mass and equal amount of heat is applied? Explain why.
Answers
Answer:
Substance B
Explanation:
Molar heat of A = 31.2J/mole.°C
Molar heat of B = 11.2 J/mole∙°C.
The molar heat of a substance is the amount of heat that must be added to a mole of a substance to raise the temperature by 1°C.
Substance B will heat up faster compared to A. It has a smaller molar heat compared to A. This suggests that it will require lesser heat to raise its temperature by 1°C.Which branch of Earth science focuses more specifically on Earth's atmosphere?
Answers
Answer:
Meteorology
Explanation:
Meteorology focuses on Earth's atmosphere and, especially, how changes in the atmosphere affect weather and climate on Earth's surface.
how many groups and periods in periodic table
Answers
There are 18 groups and 7 periods in periodic table.
The periodic table of chemical elements, often called the periodic table, organizes all discovered chemical elements in rows, called periods.
The chemical elements in columns, called groups.
The periodic table of chemical elements, it is called the periodic table because of the way the elements are arranged according to increasing atomic number.
The periodic table of elements puts all the known elements into groups with similar properties. This makes it an important tool for chemists and scientists.
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What is the coefficient for sodium chloride when this equation is balanced?
Answers
Answer:
To resolve this, we need to place the coefficient “2” in front of the sodium in the reactant, to give the equation shown below. 2 Na (s) + Cl 2 (g) → 2 NaCl (s) In this equation, there are two sodiums in the reactants, two sodiums in the products, two chlorines in the reactants and two chlorines in the products; the equation is now balanced.
Explanation: