Chemistry Final Review

Balancing Chemical Equations

100

____ N₂ + ____ H₂ →  ____ NH₃

___N₂ + __3__H₂  --> _2__NH₃

200

___Al + ___O₂ --> ___Al₂O₃

_4__Al + __3_O2 --> _2__Al₂O₃

300

 ___P + ___O₂  → ___P₂O₅ 

4 P + 5O₂  →2P₂O₅

400

____Zn + ____H₂SO₄ --> ____ZnSO₄ + ____H₂

Balanced!

500

___P + ___O₂ --> ___P₂O₅

__4_P + __5_O₂ --> __2_P₂O₅

Mole Conversions

100

What is the conversion factor for particles, atoms, and molecules?

6.02 x 10²³ / 1mole or 1mole/6.02 x 10²³

200

How many moles of magnesium is 3.01 x 10²² atoms of magnesium?

0.05 moles of Mg

300

Convert 8.21 L of Chlorine gas (Cl₂) to moles of Chlorine gas.

0.37 moles

400

You have a 15 g slab of salt, how many sodium chloride molecules (NaCl) make up the slab?

1.55x10²³ molecules

500

What would have a larger volume? 4.13 moles of Br₂ or 4.12 moles of Cl₂?

92.51 L Br₂      vs 92.29 L Cl₂

Percent Comp

100

Determine the percent of Na in NaCl

39.34% of Na

200

A compound consists of 5 g of Mg and 17g of oxygen, find the percent composition of Oxygen.

77.27%

300

Determine the percent of calcium in a compound containing 62g of Ca, 85g of O and 16g of H. 

38.04%

400

Determine the percent of Oxygen, in a compound containing 1.19 moles of C & 2.38 moles of O.

72.71%

500

Find the percent comp of a phosphorous that has 0.490 mol of gallium and 0.324 mol of phosphorus

22.69%

Creating Formulas from Names

100

An ionic bond occurs between a _____ and a _______

metal and nonmetal or cation and anion

200

phosphorus pentabromide

PBr₅

300

sodium carbonate

Na₂CO₃

400

Magnesium Hydroxide

Mg(OH)₂

500

Zinc (II) acetate

Zn(C₂H₃O₂)₂

Creating Names from Formulas

100

A covalent bond occurs between a _____ and a ______

Nonmetal and a nonmetal

200

LiOH

Lithium Hydroxide

300

CaCO₃

Calcium Carbonate

400

P₂S₃

diphosphorous trisulfide

500

CoS

Cobalt (II) Sulfide