Question

Calculate the mass, in grams, in 2.28 moles of each of the following: Cd, SO3, C5H10O5, Ba(HCO3)2, SF6.

Dinitrogen oxide (or nitrous oxide), N2O, also known as laughing gas, is widely used as an anesthetic in dentistry.

1. How many grams are in 1.30 moles of dinitrogen oxide?

2. How many moles are in 35.0 g of dinitrogen oxide?

Answer 1

A) Calculate the mass, in grams, in 2.28 moles of each of the following: Cd, SO₃, C₅H₁₀O₅, Ba(HCO₃)₂, SF₆.

i) Cd

Atomic mass of Cd = 112.411 g/mol

Mass in grams in 2.28 moles of Cd = 112.411 g/mol x 2.28 moles = 256.29 g

ii) SO₃

Molar mass of SO₃ = 80.066 g/mol

Mass in grams in 2.28 moles of SO₃ = 80.066 g/mol x 2.28 moles = 182.55 g

ii) C₅H₁₀O₅

Molar mass of C₅H₁₀O₅ = 150.13 g/mol

Mass in grams in 2.28 moles of C₅H₁₀O₅ = 150.13 g/mol x 2.28 moles = 342.29 g

ii) Ba(HCO₃)₂

Molar mass of Ba(HCO₃)₂ = 259.360 g/mol

Mass in grams in 2.28 moles of Ba(HCO₃)₂ = 259.360 g/mol x 2.28 moles = 591.34 g

ii) SF₆

Molar mass of SF₆ = 146.06 g/mol

Mass in grams in 2.28 moles of SF₆ = 146.06 g/mol x 2.28 moles = 333.01 g

B) Dinitrogen oxide (or nitrous oxide), N₂O, also known as laughing gas, is widely used as an anesthetic in dentistry.

1. How many grams are in 1.30 moles of dinitrogen oxide?

Molar mass of dinitrogen oxide = 44.013 g/mol

Mass in grams in 1.30 moles of dinitrogen oxide = 44.013 g/mol x 1.30 moles = 57.21 g

2. How many moles are in 35.0 g of dinitrogen oxide?

Molar mass of dinitrogen oxide = 44.013 g/mol

Moles in 35.0 g of dinitrogen oxide = 35.0 g/ (44.013 g/mol) = 0.795 moles