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WorksheetsMOL KIMIAT4
Total questions: 21
Worksheet time: 1hrs 25mins
Name
Class
Date
1.
Which substance has the greatest molecular mass?
a)
H2O2
b)
NO
c)
CF4
d)
I2
2.
The gram formula mass of NH4Cl is
a)
22.4 g/mol
b)
28.0 g/mol
c)
53.5 g/mol
d)
95.5 g/mol
3.
N2 + 3H2 −-> 2NH3
How many moles of ammonium are produced when 3 moles of nitrogen react with hydrogen?
a)
6 moles Ammonium
b)
1.5 moles ammonium
c)
9 moles ammonium
d)
9 moles hydrogen
4.
H2+Cl2-->2HCl
How many moles of Cl2 are needed to react with 3 moles of H2?
a)
5
b)
2
c)
3
d)
6
5.
What is the number of moles of 112 liter chlorine gas at STP?
a)
3 mol
b)
4 mol
c)
5 mol
d)
6 mol
6.
What is the mass of 0.2 mol of Al? (Ag:27g/mol)
a)
27 g
b)
54 g
c)
5,4 g
d)
2,7 g
7.
How many moles are in 225 g of CO?
a)
28.01 mole
b)
4.82 x 1024 mole
c)
6,302,25 mole
d)
8.03 mole
8.
Find the molar mass of C8H18.
a)
114 g/mol
b)
26 g/mol
c)
66 g/mol
d)
338 g/mol
9.
6.02x1023 is known as
a)
the address to get "free shavacado"
b)
Avogadro's number.
c)
Avocado's number.
d)
the genetic make up of Guacamole.
10.
2H2 + O2 → 2H2O
How many moles of water can be produced if 8 moles H2 are used?
How many moles of water can be produced if 8 moles H2 are used?
a)
4 moles
b)
8 moles
c)
16 moles
d)
2 moles
11.
How many grams are in 7.8 moles of NaCl?
a)
476grams
b)
460 grams
c)
452 grams
d)
462 grams
12.
N2 + 3H2 −-> 2NH3
How many moles of hydrogen are needed to react with 1 mole of nitrogen?
How many moles of hydrogen are needed to react with 1 mole of nitrogen?
a)
3
b)
2
c)
1
d)
4
13.
What is the relative formula mass of NaOH?
a)
20
b)
39
c)
40
d)
45
14.
What is the mass number?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
15.
What is the mass percentage of carbon in carbon dioxide?
a)
27.3%
b)
42.9%
c)
57.1%
d)
72.7%
16.
Using the following equation:
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)
How many moles of iron can be made from 6 moles H2?
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)
How many moles of iron can be made from 6 moles H2?
a)
4 moles Fe
b)
6 moles Fe
c)
9 moles Fe
d)
2 moles Fe
17.
What is the empirical formula for the following molecular formula: C6H14
a)
C6H14
b)
C3H7
c)
CH2
d)
CH3
18.
What is the empirical formula for the following molecular formula: C5H12
a)
C5H12
b)
CH3
c)
CH2
d)
C2.5H6
19.
C6H12O6
a)
Empirical
b)
Molecular
20.
Which compound has the smallest molar mass?
a)
CO
b)
CO2
c)
H2O
d)
H2O2
21.
Avogadro's number of representative particles is equal to one_____.
a)
kilogram
b)
gram
c)
kelvin
d)
mole
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