MORE CONVERSIONS
Some useful relationships:
1 in = 2.54 cm
1 lb = 454 g
1 gal = 3.79 L
1 mile = 1.61 km
USE ONLY THE RELATIONSHIPS ABOVE AND THE “GOLDEN” PREFIXES I ASKED
YOU TO MASTER. DO NOT “GOOGLE” THE DIRECT CONVERSIONS.
Convert from
745 mL
3.45 nm
105 mm
884 g
102 ft3
222.79 g/in3
43.607 kg/ft3
490 lbs/ft3
105 miles / hr
to
L
cm
km
lbs
gal
g/mL
g/mL
g/mL
m/s
76) Which of the following contains the most atoms? You shouldn't need to do a calculation
here.
A) 10.0 g Mg
B) 10.0 g Li
C) 10.0 g Ca
D) 10.0 g Kr
E) 10.0 g Ba
77) Which of the following contains the fewest atoms? You shouldn't need to do a calculation
here.
A) 10.0 g Mg
B) 10.0 g Li
C) 10.0 g Ar
D) 10.0 g Rb
E) 10.0 g Cs
78) How many Li atoms are contained in 97.9 g of Li?
A) 5.90 × 1025 Li atoms
B) 7.09 × 1021 Li atoms
C) 8.49 × 1024 Li atoms
D) 4.27 × 1022 Li atoms
E) 4.18 × 1024 Li atoms
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79) Calculate the mass (in g) of 2.1 × 1024 atoms of W.
A) 3.9 × 102 g
B) 2.4 × 102 g
C) 3.2 × 102 g
D) 1.5 × 102 g
E) 6.4 × 102 g
80) How many gold atoms are contained in 3.75 moles of gold?
A) 1.23 × 1024 gold atoms
B) 2.26 × 1024 gold atoms
C) 2.26 × 1023 gold atoms
D) 9.03 × 1025 gold atoms
E) 6.50 × 1025 gold atoms
81) What mass (in g) does 0.990 moles of Kr have?
A) 83.0 g
B) 119 g
C) 52.8 g
D) 60.0 g
E) 35.6 g
82) How many moles of potassium are contained in 200 g of potassium?
A) 5.11 moles
B) 0.956 moles
C) 13.3 moles
D) 10.53 moles
E) 6.46 moles
83) How many moles are in 2.16 × 1024 atoms of magnesium?
A) 35.9 moles
B) 3.59 moles
C) 0.359 moles
D) 7.18 moles
E) 0.90 moles
84) How many atoms are in 7.50 moles of Ca?
A) 4.52 × 1024 atoms
B) 1.52 × 1024 atoms
C) 5.02 × 1023 atoms
D) 3.01 × 1024 atoms
E) 7.53 × 1023 atoms
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85) How many atoms are in 2.50 moles of N?
A) 4.52 × 1024 atoms
B) 1.51 × 1024 atoms
C) 5.02 × 1023 atoms
D) 3.01 × 1024 atoms
E) 7.53 × 1023 atoms
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