Chemistry Chapter 10 Review

Molar mass

Moles, mass, volume & particles

Vocabulary

Multistep Conversions

Percentage Composition & Formulas

100

Calculate molar mass of Pb

207.2 g/mol

100

Calculate number of atoms in 3 moles of calcium

1.806e24

100

equals the number of items in a mole (6.02 x 10²³)

Avogadro's Number

100

Calculate the number of atoms in 10 liters of Neon at STP

2.69e23

100

Calculate the percentage composition of H₂O

H:11.2%

O: 88.8%

200

Calculate molar mass of MgO

40.3 g/mol

200

Calculate the volume at STP of 2.5 moles O₂

56L

200

mass in grams of 1 mole of a substance

molar mass

200

Calculate the volume of 5.2 x 10²³ formula units of O₂

19.3 L

200

Calculate the percentage composition of a compound composed of 28.02 g nitrogen and 64 g oxygen.

N: 30.4%

O: 69.6 %

300

Calculate molar mass of AgNO₃

169.9 g/mol

300

Calculate the mass of 0.75 mol C₆H₁₂O₆

135.135 g/mol

300

A formula that gives the simplest whole-number ratio of the atoms of the elements

Empirical Formula

300

Calculate the formula units in 20 g KBr

1.01e23

300

Find the molecular formula for a compound with the empirical formula CH₃O if the molecular mass is 186.24 g/mol

C₆H₁₈O₆

400

Calculate molar mass of Na₃PO₄

164 g/mol

400

Calculate the number of moles of 3.55 x 10²⁰ formula units of CaSO₄

5.897 e -4

400

the percent of the mass made up by each element in the compound

Percentage composition

400

Calculate the mass of 3.5 x 10²³ formula units of Mg(NO₃)₂

86.24 g

400

Find the empirical formula for an unknown compound with 38.43% Mn, 16.80 % C, and 44.77% O.

MnC₂O₄

500

Calculate molar mass of Pb(Cr₂O₇)₂

639.2 g/mol

500

Calculate the number of moles of 450 g Ca(OH)₂

6.07 moles

500

Formula that gives the actual number of atoms of each element in a molecular compound

Molecular formula

500

Calculate the number of Nitrogen ATOMS in 56 g N₂O

1.53e24 N atoms

500

A compound is composed of 52.93% carbon, 5.92% hydrogen, and 41.15% nitrogen. The molar mass is 204.2 g/mol Determine its empirical and molecular formula.

C₃H₄N₂

C₉H₁₂N₆