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WorksheetsWeekly Science Quiz #3 Grade 10
Total questions: 10
Worksheet time: 20mins
What is the molar mass of NaSO4?
119.1 g/mol
142.1 g/mol
71.1 g/mol
101.1 g/mol
What is the molar mass of NaCl2?
94 g/mol
58.4 g/mol
45 g/mol
85 g/mol
What is the molar mass of K(OH)2?
56.1 g/mol
73.1 g/mol
37 g/mol
57.1 g/mol
What is the molar mass of NH3(NO4)
95 g/mol
80 g/mol
173 g/mol
63 g/mol
A student recovers 9.7 grams of CaCl2 in a lab experiment. How many moles of CaCl2 is this?
8.7 x 10-2 mol CaCl2
1.1 x 103 mol CaCl2
11.5 mol CaCl2
.13 mol CaCl2
A certain reaction requires 3.4 moles of H2O. How many grams of water is this?
61.2 grams H2O
0.18 grams H2O
5.3 grams H2O
77.4 mol CaCl2
A sample of Carbon is placed on a digital scale and found to have a mass of 12.0 grams. How many moles of Carbon is this?
12 moles
1 mole
0.1 moles
1.2 moles
A sample of Carbon is placed on a digital scale and found to have a mass of 12.0 grams. How many atoms of carbon are on the scale?
1 atom
6.02 x 1023atoms
12 atoms
Not Enough Information
In the "Formation of a Precipitate Lab" which substance was the precipitate?
Sodium Carbonate
Magnesium Carbonate
Magnesium Sulfate
Sodium Sulfate
In the "Formation of a Precipitate Lab" what is one reason that your yield could be too high?
Filter paper didn't totally dry
Some of the precipitate passed through the filter
You added too much water
You added to little water
