Exam (elaborations) CHEM 1021 Week 15 quiz solved (CHEM1021)

CHEM 1021Week 15 quiz
Question 1 of 25
4.0 Points
A sample of a gas occupies 1.40 × 103 mL at 25°C and 760 mmHg. What volume will it occupy at
the same temperature and 380 mmHg?






A.

1,400 mL





B.

2,800 mL





C.

2,100 mL





D.

1,050 mL





E. 700 mL

Question 2 of 25
4.0 Points
9.45 g of liquid hexane (C6H14) is introduced into a 10.0 L vessel containing 13.15 atm of oxygen gas
at 21ºC and ignited, yielding carbon dioxide and water. If the vessel is then cooled to –10.ºC, what
will be the gas pressure inside the vessel?

, 

A.

12.6 atm





B. 13.2 atm





C.

10.9 atm




D.

3.09 atm





E.

1.42 atm
Question 3 of 25
4.0 Points
A pressure that will support a column of Hg to a height of 256 mm would support a column of water
to what height? The density of mercury is 13.6 g/cm3; the density of water is 1.00 g/cm3.






A.

18.8 mm

, 

B.

1.00 × 102 ft





C. 348 cm





D.

33.8 ft





E.

76.0 cm
Question 4 of 25
4.0 Points
Which conditions of P, T, and n, respectively, are most ideal?






A.

low P, high T, high n





B.

high P, low T, high n