Chemistry Semester 2 Exam

Front

Back

2.5 g sulfur

Front

Back

0.500 mole

Front

Which quantity is equivalent to 39 grams of LiF?

Back

1.5 moles

Front

What is the percent by mass of hydrogen in NH₃ (gram formula mass = 17.0 grams)?

Back

17.6%

Front

A compound has the empirical formula NO₂. Its molecular formula could be –

Back

NO₂.

Front

When the equation ___ Al(s) + ___ O₂(g) → ___ Al₂O₃(s) is correctly balanced using the smallest whole numbers, what will be the coefficient of Al(s)?

Back

4

Front

The chemical equation below represents a reaction that occurs under standard conditions.
KOH + HNO₃ → KNO₃ + H₂O
Which process is represented by this equation?

Back

Neutralization

Front

How many moles of oxygen react completely with 8.0 moles of C₂H₆ in a combustion reaction?

Back

28.0

Front

Which of the following is true of a limiting reagent?

Back

I, II, and III

Front

A mass of gas is enclosed in a rigid container. What happens if the velocity of the gas molecules colliding with the sides of the container increases?

Back

The pressure of the gas will increase.