Question

E: How many moles of aluminum ions are present in 0.32 moles of Al2(SO4)3?

F: How many moles of sulfate ions (SO42?) are present in 1.3 moles of Al2(SO4)3?

G: Calculate molar mass C6H14O6 (sorbitol) Express your answer to two decimal places and include the appropriate units.

H: The sedative Demerol hydrochloride has the formula C15H22ClNO2. How many grams are in 0.025 moles of Demerol hydrochloride?

I: How many moles of H2 are needed to react with 0.55 mol of N2?

J: How many moles of N2 reacted if 0.85 mol of NH3 is produced?

K: How many moles of NH3 are produced when 1.7 mol of H2 reacts?

L: Calculate the mass of water produced when 2.07 g of butane reacts with excess oxygen.

M: Calculate the mass of butane needed to produce 46.2 g of carbon dioxide.

N: If you have 3.17 g of H2, how many grams of NH3 can be produced?

O: How many grams of H2 are needed to react with 2.90 g of N2?

P:How many grams of NH3 can be produced from 18.0 g of H2?

Q: How many grams of glucose are produced from 23.0 g of CO2?

R: How much heat, in kilojoules, is needed to produce 23.0 g of C6H12O6?

Answer 1

(E) Al_2 (SO_4)_3 rightarrow 2 Al^3+ + 3 SO^2-_4 1 mole Al_2 (SO_4)_3 gives 2 moles Al^3+ ions 0.32 mole Al_2 (SO_4)_3 gives (2 times 0.32) = 0.64 mole Al^3+ ions. (F) 1 mole Al_2 (SO_4)_3 gives 3 moles SO^2-_4 ions 1.3 mole Al_2 (SO_4)_3 gives (1.3 times 3) = 3.9 mole SO^2-_4 ions. (G) C_6 H_14 O_6 Molar mass = {(12.01 times 6) + (1.008 times 14) + (15.99 times 6)} g/mol = 182.11 g/mol