## Symbols, formula and equations

### 1

Which is the correct formula for sodium oxide?

### 2

Which is the correct formula for magnesium nitride?

### 3

Which is the correct formula for sodium hydroxide?

### 4

Which is the correct formula for ammonium carbonate?

### 5

Which is the correct sequence of numbers to get the following equation to balance? _C3H8 + _O2 → _CO2 + _H2O

### 6

Which is the correct sequence of numbers to get the following equation to balance: _ Li + _N2 → _Li 3N

### 7

The half equation for the conversion of copper(II) ions to copper is

### 8

Chlorine reacts with sodium iodide to form sodium chloride and iodine. Which of the following is the ionic equation for this reaction?

### 9

Which of the balanced symbol equations is correct for the following word equation? calcium hydrogencarbonate + sulfuric acid → calcium sulfate + carbon dioxide + water