WorksheetsUnit 6 Study Guide
Total questions: 10
Worksheet time: 50mins
Name
Class
Date
1.
6. . Which term is described as the lowest whole-number ratio of elements in a compound?
a)
molecular formula
b)
hydrate
c)
percent composition
d)
empirical formula
2.
11. Copper (Cu) is a transition element used in the making of coins. Calculate the mass in grams of 0.0420 mol of copper.
a)
0.252 g
b)
0.00697 g
c)
2.67 g
d)
6.61 g
3.
13. Which is the percent composition of phosphorus in Zn3(PO4)2?
a)
50.1 %
b)
9.66 %
c)
24.01 %
d)
16.1 %
4.
16. What is the mass of 2.25 moles of sulfuric acid (H2SO4)?
a)
220 g
b)
98.0 g
c)
50.0 g
d)
112 g
5.
24. . Which is the formula for a compound that contains 64.75 g nitrogen and 185.25 g oxygen?
a)
NO
b)
NO2
c)
N2O
d)
N2O5
6.
25. Which is the correct molar mass for the compound FeSO4?
a)
103.85 g/mol
b)
415.4 g/mol
c)
247.85 g/mol
d)
151.91 g/mol
7.
28. Which is the mass of 8 moles of sodium chloride?
a)
0.137 g/mol
b)
7.3 grams
c)
468 grams
d)
468 mol
8.
31. How many formula units are in 3.6 grams of NaCl?
a)
3.7 × 1022
b)
0.06
c)
1.3 × 1026
d)
1.0 × 1021
9.
37. Which is the molar mass of the element calcium?
a)
20.180 g/mol
b)
40 g/mol
c)
20 g/mol
d)
40.078 g/mol
10.
43. How many moles of carbon dioxide contain 3.79 × 1023 molecules carbon dioxide?
a)
0.630 mol
b)
22.8 mol
c)
0.630 × 1023 mol
d)
0.630 × 1024 mol
100 %
