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WorksheetsMass% and Empircal Equations
Total questions: 13
Worksheet time: 16mins
Name
Class
Date
1.
What goes on the top of the equation for Mass%. (In the red box)
a)
Mass of the Element (Part)
b)
Mass of the Whole
Mass of the Whole Compound
Mass of the Whole Compound
c)
Mass of half the elements
d)
Gary Busey
2.
T/F
If 2 compounds have the same empirical formula, they are the same (same properties, structure, etc.)
If 2 compounds have the same empirical formula, they are the same (same properties, structure, etc.)
a)
True
b)
False
3.
What is the mass percentage of Carbon in Carbon dioxide?
a)
27.3%
b)
42.9%
c)
57.1%
d)
72.7%
4.
What is 20% of 75?
a)
15
b)
60
c)
6
d)
1.5
5.
C6H12O6 Is what type of formula?
a)
Molecular
b)
Empirical
c)
Both
6.
What goes on the bottom of the Mass % formula? (in the red box)
a)
Mass of the Part
b)
Mass of the Whole
c)
42
d)
100
7.
T/F
A compounds molecular formula can be the same as its empirical formula
A compounds molecular formula can be the same as its empirical formula
a)
True
b)
False
8.
The molar ratio of a compound is found to be 1.5 C for every 2 H
What is the empirical formula of this compound
What is the empirical formula of this compound
a)
C1.5H2
b)
C3H4
c)
C2H
d)
C6H8
9.
What is the empirical formula for C3H8
a)
CH
b)
C3H8
c)
C6H16
d)
CH2.7
10.
What is the empirical formula if you have 36.84% nitrogen and 63.16% oxygen?
a)
NO
b)
N2O3
c)
N2O4
d)
N2O5
11.
What is the molecular formula if the empirical formula is C2H5 and the molecular molar mass is 58.14 g/mol?
a)
C2H5
b)
C4H10
c)
C1H2.5
d)
C4H8
12.
What is the molar mass of sodium?
a)
11.00
b)
22.99
c)
45.98
d)
3.03
13.
5 is what percent of 85?
a)
7.6%
b)
5.8%
c)
87%
d)
142%
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