I. boiling water and producing water vapor ii. freezing liquid water into ice cubes iii. mixing salt into a beaker of water until the salt dissolves iv. mixing hydrogen gas and oxygen gas together to make liquid water of the four examples listed above, which describe a chemical change? a) i. b) iv c) iii. d) ii.

When would a bouncy ball have the most potential energy

What is the molar mass of a gas that has density of 2.054 g/l

Read the chemical equation. 2c2h2 + 5o2 → 4co2 + 2h2o which of the following statements would be correct if one mole of c2h2 was used in this reaction? one mole of oxygen was used in this reaction. five moles of oxygen were used in this reaction. four moles of carbon dioxide were produced from this reaction. two moles of carbon dioxide were produced from this reaction.