Why do the planets keep orbiting the sun

Amalia uses two different dietary analysis software programs to determine the vitamin E content of a 1-oz serving of cooked asparagus. She notices the amounts given by the programs are not the same.

A lab uses nitric acid to determine the amount of minerals in a soil sample. What is the pH of the nitric acid used if it has a molarity of. 001M?

How many moles are in 50.15 g of mercury

What is the correct name for HNO3

If you change the state of something, say, liquid to solid, is it a physical or chemical change?

A certain first-order reaction (A→productsA→products) has a rate constant of 9.90*10-3 s-1s-1 at 45 ∘C∘C. How many minutes does it take for the concentration of the reactant, [A][A], to drop to 6.

Assign the oxidation number for (NH4) 3PO4

When gold is melted and formed in a mold to make a piece of jewelry, what type of change is taking place?

Do pure substances have the same chemical and physical properties

How is matter conserved in a chemical reaction