Moles and Stoichiometry

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In every chemical reaction,

In the reaction 2CO(g) + O2(g) yields 2CO2(g), what is the ratio of moles of oxygen used to moles of CO2 produced?

In a chemical reaction, the mass of the products. . .

The SI unit for the amount of a substance is the _______. (Also equal to Avogadro's number of particles.)

The representative particles of sulfur dioxide are . . .

When an equation is used to calculate the amount of product that will form during a reaction, the value obtained is called the . . .

How many hydrogen atoms are in 5 molecules of isopropyl alcohol, C3H7O?

When two substances react to form products, the reactant which is used up is called the . . .