Writing and Balancing Chemical Equations — Cumulative exam

Question 1

The MSDS for propane gives it a health rating of 1, a flammability rating of 4, and a reactivity rating of 0. According to the MSDS, which best describes propane?

Revolt · Accepted Answer

highly flammable

Question 2

Which statement correctly contrasts science and pseudoscience?

Revolt · Accepted Answer

Science is objective, whereas pseudoscience is subjective.

Question 3

How did the development of the earliest idea about atoms differ from the later work of scientists?

Revolt · Accepted Answer

It was based on the thoughts of an early philosopher.

Question 4

A Lewis electron structure of a molecule is shown. Judging by the electron domain geometry, which type of hybrid orbitals does this molecule have?

Revolt · Accepted Answer

sp3

Question 5

What is the chemical symbol for magnesium?

Revolt · Accepted Answer

Mg

Question 6

Which compound contains only a nonpolar covalent molecule?

Revolt · Accepted Answer

O2

Question 7

Which is the IUPAC name for NO?

Revolt · Accepted Answer

nitrogen monoxide

Question 8

Which statement best describes the formula equation Cl2(g) + 2KBr(aq) 2KCl(aq)+ Br2(l)?

Revolt · Accepted Answer

Chlorine gas reacts with potassium bromide to form potassium chloride in solution and liquid bromine.

Question 9

Which procedure could a student use to examine an intensive property of a rectangular block of wood?

Revolt · Accepted Answer

Determine the density.

Question 10

The chemical equation for the formation of ammonia is unbalanced.3H2(g) + N2(g) NH3(g)If three molecules of hydrogen react with one molecule of nitrogen, how many molecules of ammonia would be formed?

Revolt · Accepted Answer

2

Writing and Balancing Chemical Equations — Cumulative exam Answers

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