6.2 Reivew Question Preview (ID: 62585)
Molar Mass, Converting Mass, Moles, And Number Of Atoms, Percent Composition.
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Find the molar mass of NaBr
a) 110 g/mol
b) 49.1 g/mol
c) 102.9 g/mol
d) 58.44 g/mol
Find the molar mass for (NH4)2CO3
a) 303.3 g/mol
b) 151/2 g/mol
c) 46.04 g/mol
d) 96.0 g/mol
How many moles are in 68 grams of copper(II) hydroxide - Cu(OH)2?
a) 1.43 moles
b) 0.112 moles
c) 0.696 moles
d) 72.1 moles
How many moles are in 98.3 grams of aluminum hydroxide?
a) 4.14 moles
b) 0.81 moles
c) 2.11 moles
d) 1.26 moles
How many grams are in 0.00023 moles of calcium phosphate -- Ca3(PO4)2?
a) 0.71 grams
b) 0.071 grams
c) 7.1 grams
d) 71 grams
How many grams are in 4.5 moles of sodium fluoride?
a) 1.9 grams
b) 19 grams
c) 0.19 grams
d) 190 grams
How many atoms are in a 0.63 gram sample of Sb2S3?
a) 1.1 x 10^21 atoms
b) 0.00185 x 10^23 atoms
c) 0.11 x 10^22 atoms
d) 11 x 10^23 atoms
How many atoms are in a 5.48 gram sample of SiO2?
a) 165 x 10^26 atoms
b) 16.5 x 10^24 atoms
c) 1.65 x 10^23 atoms
d) 1.65 atoms
What percent of hydrogen is in the compound (NH4)2S?
a) 11%
b) 41%
c) 47%
d) 1%
What percent of potassium is in KMnO4?
a) 35%
b) 25%
c) 2.5%
d) 40%
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