WorksheetsRegents Chemistry Reactions Moles
Total questions: 26
Worksheet time: 52mins
Calculate how many grams are in 0.700 moles of H2O2
0.02 grams
23.8 grams
48.6 grams
12
The approximate percent by mass of potassium in KHCO3 is
19%
24%
39%
61%
What is the gram formula mass of (NH4)2SO4
66g
94g
114g
132g
How many moles are present in 39 grams of LiF?
1.0 moles
2.0 moles
0.5 moles
1.5 moles
How many moles are in 92 grams of NO2?
2
1
0.5
4
What is the percent composition by mass of aluminum in Al2(SO4)3 (gram-formula mass = 342 grams/mole)?
7.89%
15.8%
20.8%
36.0%
(0902) The mass of one mole of substance is called...
molecular mass
mole constant
molar mass
atomic weight
(0902) What is the molar mass of Ca(NO3)2?
148g
164g
102g
70g
(0902) What is the molar mass of carbon dioxide?
12 g/mol
16 g/mol
32 g/mol
44 g/mol
(0902) Which compound has the smallest molar mass?
CO
CO2
H2O
H2O2
(0903) How many moles are in 74 g of KCl
0.99 mole
0.014 mole
11 moles
0.14 mole
(0903) Determine how many grams are in 0.36 moles of CCl4.
150 g
55 g
0.0023 g
2.2 g
(0903) If you want 1.55 moles of nitrogen trichloride, how many grams should you measure out?
0.0129 g
120. g
187 g
9.33 g
The formula C2H4 can be classified as
a structural formula, only
a molecular formula, only
both a structural formula and an empirical formula
both a molecular formula and an empirical formula
What is the percent composition by mass of oxygen in Ca(NO3)2 (gram-formula mass = 164 g/mol)?
9.8%
29%
48%
59%
Crucible, cover, and hydrate: 23.9g
Crucible, cover, and salt: 21.5g
Calculate % of water lost.
The empirical formula of a substance is CH2O. Its molar mass is 180. What is the molecular formula?
C4H8O4
C2H4O2
C8H16O8
C6H12O6
What is the percent water in the following hydrate CuSO4*5H2O
36.1%
63.9
5.2
45.3
How many moles of Hydrogen atoms are in 1 mole of (NH4)2HPO4?
4
8
1
9
Which of the following gases at STP has the same number of atoms as 2.0 L of CO2 gas at STP?
4.0 L of H2 (g)
3.5 L of NH3 (g)
2.0 L of O2 (g)
1.0 L of N2 (g)
