1. The attraction between water molecules is a general type of molecular interaction called [A]. A specific type of of this molecular interaction that involves hydrogen is called [B]. [ enter answer }

2. A student writes theformula for potassium oxide as K₂O₁.What is wrong with the way she wrote it? Identify the correct formula for potassium oxide.

3. Hydrogen gas (H₂) reacts with oxygen gas (O₂) to form liquid water (H₂O). A student writes the chemical equation as:

H₂ + O₂ => H₂O₂

Is the above equation balanced correctly? Why or why not?

4. Identify the number of atoms of each element that are present in the following formulas:

5 H₂SO₄ +3SO₂ +2H₂O₂

Hydrogen (H):

Sulfur (S):

Oxygen (O):