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
Contact [7]
3 years ago
9

A 5.024 mg sample of an unknown organic molecule containing carbon, hydrogen, and nitrogen only was burned and yielded 13.90 mg

of CO2 and 6.048 mg of H2O. What is the empirical formula
Chemistry
1 answer:
Dafna1 [17]3 years ago
8 0

Answer:

C8H17N

Explanation:

Mass of the unknown compound = 5.024 mg

Mass of CO2 = 13.90 mg

Mass of H2O = 6.048 mg

Next, we shall determine the mass of carbon, hydrogen and nitrogen present in the compound. This is illustrated below:

For carbon, C:

Molar mass of CO2 = 12 + (2x16) = 44g/mol

Mass of C = 12/44 x 13.90 = 3.791 mg

For hydrogen, H:

Molar mass of H2O = (2x1) + 16 = 18g/mol

Mass of H = 2/18 x 6.048 = 0.672 mg

For nitrogen, N:

Mass N = mass of unknown – (mass of C + mass of H)

Mass of N = 5.024 – (3.791 + 0.672)

Mass of N = 0.561 mg

Now, we can obtain the empirical formula for the compound as follow:

C = 3.791 mg

H = 0.672 mg

N = 0.561 mg

Divide each by their molar mass

C = 3.791 / 12 = 0.316

H = 0.672 / 1 = 0.672

N = 0.561 / 14 = 0.040

Divide by the smallest

C = 0.316 / 0.04 = 8

H = 0.672 / 0.04 = 17

N = 0.040 / 0.04 = 1

Therefore, the empirical formula for the compound is C8H17N

You might be interested in
Two moles of an ideal gas are placed in a container whose volume is 2.3 x 10^-3 m3. The absolute pressure of the gas is 6.9 x 10
PtichkaEL [24]

Answer:

K.E.=1.97\times 10^{-21}\ J

Explanation:

Given that:-

Pressure = 6.9\times 10^5\ Pa

The expression for the conversion of pressure in Pascal to pressure in atm is shown below:

P (Pa) = \frac {1}{101325} P (atm)

Given the value of pressure = 43,836 Pa

So,  

6.9\times 10^5\ Pa = \frac{6.9\times 10^5}{101325} atm

Pressure = 6.80977 atm

Volume = 2.3\times 10^{-3}\ m^3 = 2.3 L ( 1 m³ = 1000 L)

n = 2 mol

Using ideal gas equation as:

PV=nRT

where,  

P is the pressure

V is the volume

n is the number of moles

T is the temperature  

R is Gas constant having value = 0.0821 L.atm/K.mol

Applying the equation as:

6.80977 atm × 2.3 L = 2 mol × 0.0821 L.atm/K.mol × T

⇒T = 95.39 K

The expression for the kinetic energy is:-

K.E.=\frac{3}{2}\times K\times T

k is Boltzmann's constant = 1.38\times 10^{-23}\ J/K

T is the temperature

So, K.E.=\frac{3}{2}\times 1.38\times 10^{-23}\times 95.39\ J

K.E.=1.97\times 10^{-21}\ J

3 0
3 years ago
What molecule experience hydrogen bonding
enot [183]
Hydrogen bonds to either Nitrogen, Oxygen, or Fluorine to experience Hydrogen bonding. 
3 0
3 years ago
13. The attraction between water molecules and an Na+
a_sh-v [17]

Answer:

C) Polar......

:-)

Wish .It's help you.

8 0
2 years ago
Read 2 more answers
What is the molar mass of CH2O2?
Flauer [41]
<em>M CH₂O₂:</em>
mC + mH×2 + mO₂×2
= 12g + 1g×2 + 16g<span>×2 = <u>46g/mol</u>

:)</span>
5 0
3 years ago
Read 2 more answers
Identify the following elements based on the information provided:
leonid [27]

Answer:

answer

Explanation:

answer

5 0
2 years ago
Other questions:
  • When atoms combine they form<br> A. molecules<br> B.periodic table<br> C.particles<br> D.protons
    12·1 answer
  • Sugar is easily soluble in water and has a molar mass of 342.30 g/mol. What is the molar concentration of a 259.8 mL aqueous sol
    15·1 answer
  • 17. Overall the drop in reduction potential from NADH to water is equivalent to the energy needed to synthesize six or seven mol
    12·1 answer
  • Heat energy is transferred on Earth by the processes of convection, conduction, and radiation. How does heat energy cause materi
    11·1 answer
  • HELP ASAP. NEED THIS DONE
    8·1 answer
  • On a cold, cloudy day, the local weather forecaster predicts that a high-pressure system will be moving into the area in the nex
    15·1 answer
  • 1. A sample of oxygen gas has a volume of 150 ml when its pressure is 440 mmHg. If the pressure is
    6·1 answer
  • What is the difference between test tube and boiling tube​
    10·1 answer
  • (9) A penny contains 22,452,000,000,000,000,000,000 zinc atoms and also contains
    9·1 answer
  • The diagram below represents two types of cell and animal cell and a plant cell which type of cell uses energy to carry out life
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!