Chemistry Practice Problems Mole Concept Practice Problems Solution: How many moles (or molecules or formula units) are...

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# Solution: How many moles (or molecules or formula units) are in each sample? a. 20.0 g NO2b. 1.35 kg CO2c. 40.4 g KNO3d. 102.3 kg Na2SO4

###### Problem

How many moles (or molecules or formula units) are in each sample?

a. 20.0 g NO2

b. 1.35 kg CO2

c. 40.4 g KNO3

d. 102.3 kg Na2SO4

Mole Concept

Mole Concept

#### Q. Silver chloride, often used in silver plating, contains 75.27% Ag.Calculate the mass of silver chloride required to plate 225 mg of pure silver.

Solved • Fri Mar 23 2018 11:19:50 GMT-0400 (EDT)

Mole Concept

#### Q. The world population is estimated to be approximately 7 billion people.How many moles of people are there? Express your answer using one significant f...

Solved • Thu Mar 22 2018 15:25:12 GMT-0400 (EDT)

Mole Concept

#### Q. How many moles (of molecules or formula units) are in each sample?a. 62.20 g CF2Cl2b. 21.3 kg Fe(NO3)2c. 0.1911 g C8H18d. 130 kg CaO

Solved • Fri Mar 16 2018 11:13:52 GMT-0400 (EDT)

Mole Concept

#### Q. How many molecules (or formula units) are in each sample?a. 52.03 g CCl4b. 73.85 kg NaHCO3c. 123.22 g C4H10d. 3.15 × 104 g Na3PO4

Solved • Thu Mar 15 2018 20:21:15 GMT-0400 (EDT)