Exam 2 FS12 CHEM 1310 VERSION BLUE Name______ _ _ _ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

1) How many liters of wine can be held in a wine barrel whose capacity is 26.0 gal?

1 gal= 4 qt = 3.7854 L.

A) 6.87 B) 8.4 C) 1.46 x 10-4 D) 0.146 E) 6.87 x 103

2) What is the length of the side of a cube (in cm) that has a volume of 44.4 L?

A) 6.66 B) 875 ~ C 5.4 D) 0.354 E) 66.6

3) 45 m/s =_ _ km/hr

A) 0.045 B) 2.7 C) 2.7 X 103 D) 1.6 X 105

4) Expressing a number in scientific notation __.

A) removes significant zeros

B) changes its value

C) allows to increase the number's precision

~removes ambiguity as to the significant figures

E) all of the above

5) The formula for the compound formed between aluminum ions and phosphate ions is~'

A) AlP B) AI(P04h ~ ;AIP04 D) AI3(P04h E) AI2(P04h ----./

6) Which one ofthe following is the correct formula for ammonium sulfide? r-.;

A) (NH 4hS04 (NH 4hS C) NH3S D) NH 4S03 E) N2S3

7) When calcium reacts with sulfur the compound formed is __

A) Ca2S3 B as C) CaS2 D) Ca3S2

8) Chromium and chlorine form an ionic compound whose formula is CrCI3. The name ofthis

compound is

A) chromium(lIl) trichloride

B) monochromium trichloride

E) chromium chlorine

9) The correct name for CCI4 is _

A) carbon chlorate

B) carbon chloride

C) carbon perchlorate

\.fW arbon tetrachloride

E) carbon tetra chlorate

10) The correct name for 50 is _ _ . r~

A) sulfite B) sulfoxide C) sulfate o sulfur monoxide E) su lf ur oxide

11) Magnesium burns in air with a dazzling brilliance to produce magnesium oxide: 2Mg (s) + O2(g) -7 2MgO (s)

When 4.00 g of magnesium burns, the theoretical yield of magnesium oxide is _g.

A) 4.00 @ 6.63 C) 3.32 0) 13.3 E) 0.165

12) Magnesium burns in air with a dazzling brilliance to produce magnesium oxide: 2Mg (s) + O2(g) -7 2MgO (s)

How many moles of O2 are consumed when 0.770 mol of magnesium burns?

A) 0.0317 B) .385 C) 2.60 0) 0.770 E) 1.54

13) Lithium and nitrogen react in a combination reaction to produce lithium nitride: 6Li (s) + N2 (g) -7 2Li3N (s)

How many moles of lithium nitride are produced when 0.450 mol of lithium react in this

fashion?

A) 1.35 B) 0.0750 C) 0.900 E) 0.225

14) The formula weight of aluminum sulfate A1 2(504h is __amu.

A) 59.04 B) 123.04 C) 273.06 0) 150.14 :S42.14

15) Calculate the percentage by mass of nitrogen in PtCl2(NH3h . .A) .34 B) 12.67 C) 4.95 0) 4.67 E) 9.90

16) Gaseous argon has a density of 1.40 gIL at standard conditions. How many argon atoms are in 1.00 L of argon gas at standard conditions?

22 25~. 1 x 10 B) 3.4 X 10 C) 1.5 X 1025 0) 4.7 X 1022 E) 6.02 x 1023

17) What is the empirical formula of a hydrocarbon that contains 89.94% C by mass?

A) CH3 B) C9H 10 ;Y3H4 0) CaH6 E) CgH .

18) The combustion of propane (C3HS) in the presence of excess oxygen yields CO2 and H20:

C3Hs (g) + 502 (g) -7 3C02 (g) + 4H20 (g)

When 2 ~mol of O2 are consumed in their reaction, __mol of CO2 are produced.

~ B) 2.5 C) 5.0 0) 6.0 E) 3.0

® 19) When the following equation is balanced, the coefficient of water is __

K (s) + H20 (I) -7 KOH (aq) + H2 (g)

B)l C)5 0)3 E)4

-"''"'-:::7-",""",-,-w:...;:eight of potassium phosphate K3P04 is __ amu.

A) 212.27 " B) 251.37 C) 196.27 0) 86.07 E) 173.17

~

21) T~cular weight of the acetic acid CH3C02H is __ amu .

~ B) 44 C) 48 0) 32 E) 94

22) The formula weig~ of magnesium fluoride (MgF2) is __ amu.

A) 92.9 ~2.3 C) 67.6 0) 43.3 E) 86.6