CH Stoichiometry minitest

How many moles of Ag can be produced if 200 g of Cu are reacted with excess AgNO₃ according to the equation Cu + 2AgNO₃ --> 2Ag + Cu(NO₃)₂?

• 6.29 moles Ag

• 3.14 mol Ag

• 9.43 mol Ag

• 12.58 mol Ag

A chemical reaction involving substances X and Y stops when X is completely used. X is the

• excess reactant

• limiting reactant

• primary reactant

• secondary reactant

For the reaction represented by the equation SO₃ + H₂O --> H₂SO₄, how many grams of sulfur trioxide (SO₃) are required to produce 4.00 mol of sulfuric acid (H₂SO₄) in excess water? The molar mass of SO₃ is 77.01 and the molar mass of H₂SO₄ is 94.03 g/mol.

• 320 g

• 240 g

• 160 g

• 80.0 g

The units of molar mass are

• amu/ mol

• mol/ g

• g/ mol

• mol/ amu

A balanced equation allows you to determine the

• energy release

• mechanism of the reaction

• mole ratio

• electron configuration of the product.

What is the mass in grams of 1-chloropropane (C₃H₇Cl) if 400. grams of propane (C₃H₈) react with excess chlorine gas according to the equation C₃H₈ + Cl₂ --> C₃H₇Cl + HCl?

• 225 g

• 712 g

• 178 g

• 455 g

Which reactant controls the amount of product formed in a chemical reaction?

• excess reactant

• composition reactant

• limiting reactant

• product reactant

For the reaction represented in the equation AgNO₃ + NaCl --> NaNO₃ + AgCl, how many moles of silver chloride, AgCl, are produced from 7.0 moles of silver nitrate, AgNO₃?

• 1.0 moles

• 3.0 moles

• 7.0 moles

• 10.0 moles

Given the equation 3A + 2B -->2C, the starting mass of A, and the molar mass, and you are asked to determine the moles of C produced, your first step in solving the problem is to multiply the given mass of A by

• 2 mol C

  3 mol A

• 3 mol A

  2 mol C

• molar mass A

  1 mol A

• 1 mol A

  molar mass A