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Chemistry: Counting Atoms
Test Description: Solve each problem and check the right answer. You may use a periodic table, the Mole Conversions Handout, and a calculator. HAVE FUNNNNN!
Instructions: Answer all questions to get your test result.
1) How many grams are in 1.00 mole of Li?
A
6.94 g
B
3 g
C
6 x 10^23 g
D
6.94 amu
2) The molar mass of resveratrol, C14H14O3, a compound found in wine that may provide cardio-vascular health, is
A
96
B
342
C
115
D
230
3) 6.02 X 10^23 is:
A
the number of particles in 1 mole of anything
B
a counting unit and not a mass unit
C
all of the answers are correct
D
Avogadro’s number
4) How many grams are in 1.50x10^23 atoms As?
A
18.66 g
B
0.25 g
C
1.50x10^23 g
D
18.66 amu
5) How many moles are represented by 40.1 g Ca?
A
1
B
6.02 X 10^23
C
0.5
D
2
6) How many atoms are in 5.0 moles of silver?
A
1.2 x 10^24 atoms
B
3.0 x 10^24 atoms
C
3 x 10^24 atoms
D
3.0 x 10^24 molecules
7) How many moles are in 0.56 grams of potassium?
A
21.9
B
22
C
0.028
D
0.014
8) How many moles do 3.25 x 10^5 g Pb represent?
A
67300000
B
1568
C
1570
D
67340000
9) How many grams are in 7.5 x 10^22 molecules of water
A
2.2
B
0.12
C
1.92
D
2
10) How many Royals in 0.50 mol of Royals?
A
3.0 x 10^23
B
6.0 x 10^23
C
3.011 x 10^23
D
12 x 10^23
*select an answer for all questions
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