What is the mass of a sample of a substance with a volume of 120 ml and a density of 0.75 g/ml?

The production of glyceraldehyde 3-phosphate (G3P) in the Calvin cycle requires six molecules each of ATP and NADPH. Another three molecules of ATP are then used in the cycle. What is the purpose of the three additional ATP molecules?

What is a Chemical change at a movie theater?

Why is the ionization energy of nitrogen higher than that of oxygen, in contrast to the general trend seen for ionization energy?

Is an element that is soft and easy to cut cleanly with a knife likely to be a metal or a nonmetal?

In order to break down a polymer, enzymes must add water to break the bonds between the monomers. During this process, a hydrogen from the wter is added to one of the monomers and a hydroxyl from the water molecule is added to th eother monomer,

What defines a material as being a mixture?

What do igneous rocks form from? (20pts!)

A gas at STP has a volume of 1.0 liter. If the pressure is doubled and the temperature remains constant, the new volume of the gas will be ... ?

Combustion analysis of toluene, a common organic solvent, gives 8.20 mg of co2 and 1.92 mg of h2o. if the compound contains only carbon and hydrogen, what is its empirical formula?

Why does the moon have phases? What are the four main phases of the moon? How long does it take to change from one to another?