Unit Test — Unit test Answers

Which describes a step in the process of forming an ionic bond?

This formula equation is unbalanced.BaCl2(aq) + Na2CO3(aq) BaCO3(s) + NaCl(aq) Which coefficient should be placed in front of NaCl to balance this equation?

Which word equation shows lithium oxide being formed from the reaction between oxygen and lithium?

Which of the following do Lewis structures help us understand?

Sodium combines with water to produce sodium hydroxide and hydrogen gas. Which word equation represents this violent reaction?

Nitrogen dioxide, a major air pollutant, can be produced by the combustion of nitrogen oxide as shown. 2NO + O2 2NO2 In a plant, 1,500 kg of nitrogen oxide is consumed per day to produce 1,500 kg of nitrogen dioxide per day. What is the percent yield?Use .

Consider the equation for the formation of water.2H2 + O2 2H2OWhat is the theoretical yield of H2O if 130 g of H2O is produced from 18 g of H2 and an excess of O2?

Based on its location in the periodic table, what can most likely be predicted about sulfur?

What does it mean that valence electrons in a metal are delocalized?

Which compound most likely contains polar covalent bonds?

In a chemical reaction, substance R reacts with compound XY to produce 47.0 g of compound RX. If the theoretical yield of RX is 56.0 g, what is its percent yield?Use .

An unbalanced chemical equation for the reaction of boron fluoride with lithium sulfite is shown below.BF3 + Li2SO3 B2(SO3)3 + LiFWhat is the coefficient of lithium fluoride in the balanced chemical reaction?

Which reason best explains why metals are malleable?

Which statement describes the electron sea model for metallic bonding?

Which of the following could form an ionic bond with an anion?