When 12.0 grams of hydrogen react with oxygen, how many grams of water are produced?
Write the balanced equation first

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

Compare and contrast solutions and suspensions

Which of the following units is not an official si unit