from the beginning of a chemical reaction to the end, what stays the same? mark all that apply. *

moles

mass

number of atoms

types of compounds

Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. in the first step, nitrogen and hydrogen react to form ammonia: (g) (g) (g) in the second step, ammonia and oxygen react to form nitric acid and water: (g) (g) (g) (g) calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .

Concentrations expressed as a percent by mass are useful when the solute is a a. liquid b. gas c. solid

What are several ways to reduce the effect of friction