Chemical Reactions and Limiting Reactants — Test

Question 1

Which shows the correct relationship between the molecular formula and the empirical formula for cap c sub 2 cap h sub 10 cap n sub 2 ?

Revolt · Accepted Answer

molecular formula is equal to 2 times empirical formula

Question 2

Consider the chemical equation. 2 NBr sub 3 plus 3 NaOH rightarrow cap n sub 2 plus 3 NaBr plus 3 HOBr If there are 40 mol of NBr sub 3 and 48 mol of NaOH , what is the excess reactant?

Revolt · Accepted Answer

NBr sub 3

Question 3

Which of these scenarios is most likely a chemical reaction?

Revolt · Accepted Answer

Two colorless liquids are added together, and a colorless liquid and a green solid remain.

Question 4

Which symbol can be used to indicate a chemical reaction that takes place in the presence of a catalyst?

Revolt · Accepted Answer

Pt set over right arrow

Question 5

Which step would help a student find the molecular formula of a compound from the empirical formula?

Revolt · Accepted Answer

Multiply the subscripts in the empirical formula by the ratio of the compound's molar mass to the empirical formula's mass.

Chemical Reactions and Limiting Reactants — Test Answers

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