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Chemical Ratios

Balance the following chemical equations.

- K
_{2}O + H_{2}O KOH - Na
_{2}O_{2}+ H_{2}O NaOH + O_{2} - H
_{3}AsO_{4}As_{2}O_{5}+ H_{2}O - Al
_{2}(SO_{4})_{3}+ Ca(OH)_{2}Al(OH)_{3}+ CaSO_{4} - H
_{3}BO_{3}H_{4}B_{6}O_{11}+ H_{2}O - H
_{2}S + Cl_{2}S_{8}+ HCl - C
_{7}H_{16}+ O_{2}CO_{2}+ H_{2}O - Na +
NaNO
_{3}Na_{2}O + N_{2} - C
_{3}H_{8}+ O_{2}CO_{2}+ H_{2}O - NH
_{3}+ NO N_{2}+ H_{2}O

Find the molar mass of each of the following chemicals. Express your answer in units of grams per mole (g/mol).

- pure sodium
- oxygen gas
- pure copper
- pure iron
- sodium chloride

- water
- iron(III) oxide
- sodium hydroxide
- ammonium chloride
- calcium sulfate

Calculate the molar mass in grams per mole (g/mol) for each of the following chemicals. Use five significant figures in your answer. Use all available digits from your periodic table.

- K
_{2}O - H
_{2}O - KOH
- C
_{3}H_{8} - O
_{2}

- CO
_{2} - NH
_{3} - NO
- N
_{2} - Al
_{2}(SO_{4})_{3}

You must balance the chemical equations on the front of this paper before completing the following problems. In each one you are asked to use the ratios implied by the equation to make predictions about numbers of molecules, numbers of moles or the mass the chemicals involved in the reaction.

- Equation 1 from the front of this paper. If you have 1 molecule of K
_{2}O how many molecules of water will react with it? - Equation 1 from the front of this paper. If you have 1 molecule of K
_{2}O how many molecules of KOH will be produced? - Equation 1 from the front of this paper. If you have 1,000 molecules of K
_{2}O how many molecules of water will react with them? - Equation 1 from the front of this paper. If you have 1.5 × 10
^{6}molecules of K_{2}O how many molecules of KOH will be produced? - Equation 9 from the front of this paper. If you have 1 mole of C
_{3}H_{8}then how many moles of oxygen gas do you need?

- Equation 9 from the front of this paper. If you have 2 moles of C
_{3}H_{8}then how many moles of oxygen gas do you need? - Equation 9 from the front of this paper. If you have 12 moles of C
_{3}H_{8}then how many moles of carbon dioxide gas will be prodcued? - Equation 9 from the front of this paper. If you have 44.1 g of C
_{3}H_{8}then how many moles of water vapor will be prodcued? - Equation 9 from the front of this paper. If you have 44.1 g of C
_{3}H_{8}then how many moles of carbon dioxide gas will be prodcued? - Equation 9 from the front of this paper. If you have 88.2 g of C
_{3}H_{8}then how many grams of water vapor gas will be prodcued?