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WorksheetsChemical Formulas
Total questions: 20
Worksheet time: 23mins
Name
Class
Date
1.
Which of the following formulas is inorganic?
a)
CHO
b)
CH
c)
SiO
d)
CHCOOH
2.
Which of the following elements is required in an organic compound?
a)
nitrogen
b)
oxygen
c)
carbon
d)
sodium
3.
Which compound below is Organic?
a)
C6H12O6
b)
H2O
c)
N2
d)
BaBr2
4.
Organic compounds ALWAYS contain what two elements?
a)
C and O
b)
O and H
c)
C and H
d)
H and Fe
5.
How many different elements are in this chemical formula: C2H2ClK3
a)
6
b)
8
c)
2
d)
4
6.
Which of the following is a pure substance?
a)
O2
b)
Al2CO5
c)
C6H12O6
d)
SiO2
7.
Which of the following chemical formulas represents a compound?
a)
C3
b)
O2
c)
CH3CHO
d)
H2
8.
Can be found on the periodic table
a)
Element
b)
Compound
c)
MIxture
9.
What is water?
a)
element
b)
compound
c)
mixture
10.
How many Aluminum are in Al2O3?
a)
3
b)
2
c)
5
11.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
12.
How many Chlorine are in MgCl2?
a)
2
b)
1
c)
3
13.
In this compound structure of alcohol, how many Hydrogen atoms are there?
a)
2
b)
4
c)
6
d)
8
14.
Number of H in 3(NH₄)₂CrO₄
a)
4
b)
2
c)
8
d)
24
15.
Which of the following statements is true about the molecule below?
2NaC2H3O2
2NaC2H3O2
a)
There are 3 Nitrogen atoms
b)
There are 2 Carbon atoms
c)
There are 6 Hydrogen atoms
d)
There are 2 Oxygen atoms
16.
Which of the following statements is true about the molecule below?
4NH4C2H3O2
4NH4C2H3O2
a)
There are 48 total atoms
b)
There are 5 total elements
c)
There are 7 Hydrogen atoms
d)
There are 12 total atoms in this molecule
17.
What is the subscript for the following molecule?
2CaClO3
2CaClO3
a)
2
b)
3
c)
Both 2 & 3
d)
Calcium
18.
What is the coefficient for the following molecule?
4Fe2(CO3)3
4Fe2(CO3)3
a)
2
b)
3
c)
Both 2 & 3
d)
4
19.
Number of Cr atoms in (NH₄)₂Cr₂O₇
a)
2
b)
6
c)
8
d)
56
20.
Number of N in (NH₄)₂CrO₄
a)
1
b)
2
c)
8
d)
16
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