What is the mass in amu of a carbon-12 atom?

The pressure of a sample of helium is 2.0 atm in a 200-mL container. If the container is compressed to 10 mL without changing the temperature, what is the new pressure?

True/False: A neutral atom contains the same number of protons as electrons

6.002cm = what to sig figs

If 0.899J of heat causes a 0,692 degree C temperature change, what mass of water is present?

What are the four symbols for physical states of reactants and products?

How many moles of oxygen gas are produced from the decomposition of six moles of potassium

Why do magnesium and oxygen combine?

When a chemical reaction takes place, the number of atoms of each element in the reactants

A scientist is measuring the pressure that is exerted by each of the following gases in the atmosphere: carbon dioxide, oxygen, and nitrogen. Which term most likely describes what she is measuring?

How would you expect energy to change during a chemical reaction? A. Energy will be increased. B. Energy will be decreased. C. Energy will be converted into another form. D. Energy will be consumed.