Home Chapter 6 Self-Quiz 3

# Self-Quiz 3

This activity contains 10 questions.

## Calculate the mass, in grams, of 0.158 moles of iodine pentafluoride.

 35.1 g IF5 115 g I5F5 23.1 g IF 221.896 g IF5 1.40 x 103 g IF5

## The decomposition by heating of solid potassium chlorate yields solid potassium chloride and oxygen gas as products. Write a balanced equation for this reaction.

 KClO2(s) KCl(s) + O2(g) KClO3(s) KCl(s) + 3 O(g) 2 KClO3(s) 2 KCl(s) + 3 O2(g) 2 KClO3(s) 2 KClO2(s) + O2(g) KClO4(s) KCl(s) + 2 O2(g)

## How many moles of lead(II) acetate are in 25.4 g of lead(II) acetate?

 8.26 x 103 molPb(C2H3O2) 2 0.0781 mol Pb(C2H3O2)2 12.8 moles Pb(C2H3O2)2 0.0537 mol Pb2C2H3O2 0.0954 mol PbC2H3O2

How many moles of carbon dioxide are produced in the following reaction when 4.0 x 108 moles of O2 are consumed?
2 C8H18(l) + 25 O2(g) 16 CO2(g) + 18 H2O(l)

 5.5 x 108 mol CO2 4.3 x 10-16 mol CO2 1.1 x 1010 mol CO2 2.6 x 108 mol CO2

In an oxyacetylene welding torch, acetylene (C2H2) burns in pure oxygen with a very hot flame. How many grams of oxygen are required to react with 52.0 g of acetylene?
C2H2 + O2 CO2 + H2O

 128.0 g O2 64.0 g O2 80.0 g O2 160 g O2 130 g O2

## When oxidation occurs:

 Oxygen is gained, hydrogen is lost, or electrons are lost. Oxygen is gained, hydrogen is gained, or electrons are gained. Oxygen is lost, hydrogen is lost, or electrons are gained. Oxygen is lost, hydrogen is lost, or electrons are lost.

## What is the oxidation number of carbon in carbon dioxide?

 +2 0 4 +4 -2

For the reaction below, which of the following statements is (are) true?

Mg + Cu2+(aq) Mg2+(aq) + Cu

(i) Mg is oxidized; (ii) Cu2+ is oxidized; (iii) Mg is reduced; (iv) Cu2+ is reduced

 i and ii ii and iii i and iv iii and iv i and iii

## Which of the following is a redox reaction?

 BaCl2 + Na2SO4 BaSO4 + 2 NaCl NaOH + HCl H2O + NaCl NH3 + HCl NH4Cl 2 Na + Cl2 2 NaCl Ag+ + Cl- AgCl

Photosynthesis (6 CO2 + 6 H2O + energy C6H12O6 + 6 O2) is a very important reaction because it provides us with nutrients and oxygen. Which of the following statements regarding photosynthesis is true?

 The carbon in CO2 is oxidized during photosynthesis. Photosynthesis is not a redox reaction. All the oxygen atoms are oxidized during photosynthesis. The carbon in CO2 is reduced during photosynthesis.