Molecular Calculations

Question 1

nitrous oxide, N2O (an anesthesia)

Answer 1

Calculate the molecular mass of each compound.

44.02 amu

Question 2

hydrogen peroxide, H2O2 (an antiseptic)

Answer 2

Calculate the molecular mass of each compound.

34.02 amu

Question 3

sodium hypochlorite, NaClO (the active ingredient in bleach)

Answer 3

Calculate the molecular mass of each compound.

74.44 amu

Question 4

Calculate the percent composition of nitrous oxide, N2O (an anesthesia).

Answer 4

63.65% N
36.35% O

Question 5

Calculate the percent composition of hydrogen peroxide, H2O2 (an antiseptic).

Answer 5

5.926% H
94.06% O

Question 6

Calculate the percent composition of sodium hypochlorite, NaClO (the active ingredient in bleach).

Answer 6

30.86% Na

47.65% Cl

21.49% O

Question 7

Calculate the percent composition of a compound with a mass of 3.641 g, composed of 0.7301 g Ca and 2.911 g Br.

Answer 7

20.05% Ca

79.95% Br

Question 8

Calculate the percent composition of a compound with a mass of 0.7418 g, composed of 0.02569 g H, 0.40695 g O, and 0.3092 g Mg.

Answer 8

3.463% H

54.86% O

41.68% Mg

Question 9

Blood plasma has a density of 1.027 g/cm3. What is the volume of blood plasma in a sample of blood plasma that has a mass of 50.0 grams?

Answer 9

48.7 cm^3

Question 10

What is the pressure inside a 2.00 L soda bottle that contains 14.0 grams (0.318 moles) of CO2 gas when the temperature is 33.0 °C (91.4 °F) in a sunny car?

Answer 10

405 kPa