Unit 4 Review

always equal to the total mass of the products

According to the law of conservation of mass, the total mass of the reacting substances is

12 mol

For the reaction represented by the equation 2H2 + O2 yields 2H2O, how many moles of water can be produced from 6.0 mol of oxygen?

593 g

For the reaction represented by the equation 2HNO3 + Mg(OH)2 yields Mg(NO3)2 + 2H2O, how many grams of magnesium nitrate are produced from 8.00 mole of nitric acid, HNO3, and an excess of Mg(OH)2?

98.7 g

For the reaction represented by the equation Cl2 + 2KBr yields 2KCl + Br2, how many grams of potassium chloride can be produced from 300. g each of chlorine and potassium bromide?

0.119 mol

For the reaction represented by the equation Cl2 + 2KBr yields 2KCl + Br2, how many moles of potassium chlorides are produced from 119 g of potassium bromide?

0.904 mol

For the reaction represented by the equation Pb(NO3)2 + 2KI yields PbI2 + 2KNO3, how many moles of lead(II) iodide are produced from 300. g of potassium iodide and an excess of Pb(NO3)2.

320. g

For the reaction represented by the equation SO3 + H2O yields H2SO4, how many grams of sulfur trioxide are required to produce 4.00 mol of sulfuric acid in an excess of water?

NaOH

In the word equation, sodium oxide + water yields sodium hydroxide, the formula for sodium hydroxide is represented by

synthesis reaction

In what kind of reaction do two or more substances combine to form a new compound?

displacement reaction

In what kind of reaction does one element replace a similar element in a compound?

H2

In writing a chemical equation that produces hydrogen gas, the correct representation of hydrogen gas is

atoms lose electrons

The activity series of metals indicates the ease with which metal

decomposition reaction

The reaction represented by the equation 2HgO(s) yields 2Hg(l) + O2(g) is a(n)

synthesis reaction

The reaction represented by the equation 2Mg(s) + O2(g) yields 2MgO(s) is a

single-displacement reaction

The reaction represented by the equation Cl2(g) + 2KBr(aq) yields 2KCl(aq) +Br2(l) is a(n)

a coefficient

What is the small whole number that appears in front of a formula in a chemical equation?

a precipitate

When a solid produced by a chemical reaction separates from the solution it is called

reaction stops

When the limiting reactant in a chemical reaction is completely used, the

stoichiometry

Which branch of chemistry deals with the mass relationships of elements in compounds and the mass relationships among reactants and products in chemical reactions?

1,1,2

Which coefficients correctly balance the formula equation NH4NO2(s) yields N2(g) + H2O

2HF(aq) + Cl2(g) yields F2(g) + 2HCl(aq)

Which reaction does not occur?

Hydrogen plus oxygen yields water

Which word equation represents the reaction that produces water from hydrogen and oxygen?