Which forms of matter are considered pure substances?

A elements only

B mixtures only

C compounds and mixtures

D elements and compounds

Solutions Solution What it is made of A Water and Salt B Water and Sugar C Water and HCl D Water and NaOH Which of these substances would be a poor conductor of electricity? A) B) C) D)

Break apart water into form ___ions

What change would increase the amount of gas able to be dissolved in a given amount of liquid water?

The process of evaporation describes which of the following changes of state? solid ➡ liquid gas ➡ solid liquid ➡ gas solid ➡ gas

Hydrogen fuel cell powered cars emit? a. oxygen b. carbon dioxide c. hydrogen d. water

Explain Charles law

2 H2 + O2 → 2 H2O What is the product of this chemical reaction

Which of the following is a chemical property? A.) Ability to burn B.) Mass C.) Density D.) All of the above

What is the density of rock if it has a mass of 25 g?

In a popular classroom demonstration, solid sodium is added to liquid water and reacts to produce hydrogen gas and aqueous sodium hydroxide. part a write a balanced chemical equation for this reaction.