1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Gre4nikov [31]
3 years ago
8

A 0.4647-g sample of a compound known to contain only carbon, hydrogen, and oxygen was burned in oxygen to yield 0.01962 mol of

CO2 and 0.01961 mol of H2O. The empirical formula of the compound was found to be C3H6O2. Show how this was calculated.
What does the empirical formula tell you about the compound?

The molar mass of the actual compound was found to be 222.27g/mol. Find the molecular formula of this compound. What does the molecular formula tell you about the compound?

Can you see what type of functional group this compound could have?
Chemistry
1 answer:
Stella [2.4K]3 years ago
6 0

Answer:

See explanation.

Explanation:

Hello,

In this case, we can show how the empirical formula is found by following the shown below procedure:

1. Compute the moles of carbon in carbon dioxide as the only source of carbon at the products:

n_C=0.01962molCO_2*\frac{1molC}{1molCO_2} =0.01962molC

2. Compute the moles of hydrogen in water as the only source of hydrogen at the products:

n_H=0.01961molH_2O*\frac{2molH}{1molH_2O}=0.03922molH

3. Compute the mass of oxygen by subtracting the mass of both carbon and hydrogen from the 0.4647-g sample:

m_O=0.4647g-0.01962molC*\frac{12gC}{1molC}-0.03922molH*\frac{1gH}{1molH}  =0.1900gO

4. Compute the moles of oxygen by using its molar mass:

n_O=0.1900gO*\frac{1molO}{16gO}=0.01188molO

5. Divide the moles of carbon, hydrogen and oxygen by the moles of oxygen (smallest one) to find the subscripts in the empirical formula:

C=\frac{0.01962}{0.01188}=1.65\\ \\H=\frac{0.03922}{0.01188} =3.3\\\\O=\frac{0.01188}{0.01188} =1

6. Search for the closest whole number (in this case multiply by 2):

C_3H_6O_2

Moreover, the empirical formula suggests this compound could be carboxylic acid since it has two oxygen atoms, nevertheless, this is not true since the molar mass is 222.27 g/mol, therefore, we should compute the molar mass of the empirical formula, that is:

M=12*3+1*6+16*2=74g/mol

Which is about three times in the molecular formula, for that reason, the actual formula is:

C_9H_{18}O_6

It suggest that the compound has a highly oxidizing character due to the presence of oxygen, therefore, we cannot predict the distribution of the functional groups as it could contain, carboxyl, carbonyl, hydroxyl or even peroxi.

Best regards.

You might be interested in
Plant cells and animal cells were observed under a microscope. The characteristics of two cells are listed below.
IRINA_888 [86]

Answer:

The answer is B

Explanation:

ITs B

4 0
3 years ago
Read 2 more answers
Arrange these molecules in order of decreasing mass: C​6​H​14​ , NO​2​ , Fe​2​O​3 ​, and CaCO​
babunello [35]

The following is the arrangement of the given molecules in decreasing order of mass: \text{ Fe2O3} > \text{C6H14} > \text{CaCO} > \text{NO2}

<u>Solution:</u>

First inorder to arrange the elements in descending order of their mass we have to calculate the molecular mass of each element. The calculation is as follows:

<u>Mass of C6H14:</u>

C\rightarrow6\times12.01 = 72.06

H\rightarrow14\times1.008 = 14.112

<em>Mass of C6H14 is 86.172</em>

<u>Mass of NO2:</u>

N\rightarrow1\times14.0067 = 14.0067

O\rightarrow2\times15.9994 = 31.9988

<em>Mass of NO2 is 46.0055</em>

<u>Mass of Fe​2​O3:</u>

Fe\rightarrow2\times55.845 = 111.69

O\rightarrow3\times15.9994 = 47.9982

<em>Mass of Fe2O3 is 159.6882</em>

<u>Mass of CaCO:</u>

Ca\rightarrow1\times40.078 = 40.078

C\rightarrow1\times12.01 = 12.01

O\rightarrow1\times15.9994 = 15.9994

<em>Mass of CaCO will be 68.0874</em>

So, the order will be 159.6882>86.172>68.0874>46.0055 which is \text{ Fe2O3} > \text{C6H14} > \text{CaCO} > \text{NO2}

6 0
3 years ago
What happens to the density and temperature of rock wit
yaroslaw [1]

Answer:

A

Explanation:

5 0
2 years ago
Under what conditions does the hydrolysis of an amide bond occur?
Mademuasel [1]
Hi.

I did some digging and I think I found what you're looking for.

I found this on Q(uizlet)

basic or acidic conditions and the reactants must be heated.

~
5 0
2 years ago
A solution is made by dissolving
barxatty [35]

Answer:

4.52 mol/kg

Explanation:

Given data:

Mass of lithium fluoride = 22.1 g

Mass of water = 188 g

Molality = ?

Solution:

Molality:

It is the number of moles of solute into kilogram of solvent.

Formula:

Molality = number of moles of solute / kilogram solvent

Mathematical expression:

m = n/kg

Now we will convert the grams of LiF into moles.

Number of moles = mass/ molar mass

Number of moles = 22.1 g/ 26 g/mol

Number of moles = 0.85 mol

Now we will convert the g of water into kg.

Mass of water = 188 g× 1kg/1000 g = 0.188 kg

Now we will put  the values in formula.

m = 0.85 mol / 0.188 kg

m = 4.52 mol/kg

8 0
2 years ago
Other questions:
  • What mass of a .413% KCN solution contains 545 mg of KCN?
    10·1 answer
  • Meghan and Rachel each apply the same amount of force to two different bowling balls. Meghan's ball, (ball A), weighs 3 pounds,
    13·2 answers
  • Consider this equilibrium: I2(s) + H2O(l) H + (aq) + I-(aq) + HOI(aq). What is the Keq expression for this equilibrium?
    14·1 answer
  • What is the pH of the solution in which the [H+] is 1.0 × 10–4 mol/L ?
    14·1 answer
  • How does litmus paper identify a base?
    11·2 answers
  • Why do pumps require energy?
    13·2 answers
  • Clouds that form at an elevation of 3 kilometers will
    6·1 answer
  • Charles's law describes the relationship of the volume and temperature of
    6·1 answer
  • Arrange the following substances in order of increasing boiling point CH3OH, CH4, CH3CH2OH, HOCH2CH2OH Multiple Choice O CH3OH
    10·1 answer
  • Jay and Jeff were responsible for recording the class weather data each day in march. What weather instrument, seen here, should
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!