WorksheetsChapter 14 Review
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
Which of the substances below is the LEAST toxic?
a)
Cola (LD50 = 140mg/kg)
b)
Aspirin (LD50 = 200mg/kg)
c)
Chlorine (LD50 = 850 mg/kg)
d)
Vitamin A (LD50 = 2000 mg/kg)
2.
How many grams of sugar (LD50 = 30 g/kg) would be lethal to a 220 lb woman (2.2 lb = 1 kg)?
a)
6600 g
b)
3000 g
c)
0.30 g
d)
0.13 g
3.
Jake measures the weight of one bottle cap as 5.03 grams, so he calculates that the weight of 100 bottle caps will be 503 grams. The actual weight of 100 bottle caps is 495 grams. What is Jake's percent error?
a)
0.16%
b)
1.6%
c)
4.0%
d)
8.0%
4.
How many atoms are there in 1 mole of CO2?
a)
1.81 x 1023 atoms
b)
1.81 x 1024 atoms
c)
6.02 x 1023 atoms
d)
6.02 x 1024 atoms
5.
The adult LD50 for aspirin is 400 mg/kg. How many 250-mg aspirin tablets would a 175-pound person need to consume to get a lethal dose? (1 kg = 2.2 lb)
a)
280
b)
241
c)
127
d)
50
6.
What is the molar mass for ammonium phosphate: (NH4)3PO4
a)
113.0 g/mol
b)
121.0 g/mol
c)
149.0 g/mol
d)
242.0 g/mol
7.
How many moles of potassium iodide (KI), are there in 50 grams?
a)
166 mol
b)
3.32 mol
c)
2.20 mol
d)
0.30 mol
8.
Which of these materials has the most moles of metal atoms?
a)
100 g of iron, Fe
b)
100 g iron (II) oxide, FeO
c)
100 g potassium chloride, KCl
d)
100 g potassium, K
9.
How many grams of alumnium are contained in 100.0 g of aluminum chloride, AlCl3?
a)
18.6 g
b)
20.2 g
c)
25.0 g
d)
41.5 g
10.
If you have 1.0 mol of each of the following compounds, which will have the greatest mass?
a)
H3PO4
b)
KCl
c)
FeCl3
d)
NI3
100 %
