Exam 1 Review Part 2

Ionic or Covalent?

100

CH₄

covalent

200

Hg₂(NO₂)₂

ionic

300

C₁₂H₂₂O₁₁

covalent

400

SO₄^-2

covalent 

500

NH₄Cl_(aq)

ionic

Balancing Reactions

100

     Fe+      O₂ →       Fe₂O₃

4 3 2 

200

__C₂H₄ + __ O₂ → ___ CO₂ + ___ H₂O

1 3 2 2

300

___ FeO₃ + __ CO --> __ Fe + __ CO₂

1 3 1 3

400

___ Al +___ HCl --> ___ AlCl₃ +___ H₂

2 6 2 3

500

__ C₂H₆O + __ O₂ --> ___ CO₂ + ___ H₂O

1 3 2 3

Random Junk

100

mass per volume 

density

200

differing number of neutrons

isotopes

300

Group 2 metals are also called

alkaline earth metals

400

How many significant figures in 201.0? 

4

500

Group that has monoatomic gases

Group 18 (Noble gases)

Molar masses

100

Which compound has a higher molar mass? HCl or HNO₃?

HNO₃

200

What is the molar mass of CuO? 

79.55 g/mol

300

What is the molar mass of CaCO₃?

100.09 g/mol

400

What is the molar mass of barium nitrate? 

261.33 g/mol

500

What is the percent by mass of sodium in table salt?

39.35%

reaction types

100

CH₄ + O₂ --> CO₂ + H₂O

Combustion

200

HCl + NaOH --> NaCl + H₂0

neutralization / acid-base

300

KI + Pb(NO₃)₂ --> KNO₃ + PbI₂

Precipitation / Double replacement

400

K₂S + H₂SO₄ --> K₂SO₄ + H₂S

gas evolution

500

KI + NaCl --> KCl + NaI

no reaction