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Counting Atoms
Test Description: Practice counting atoms to find out if an equation is balanced.
Instructions: Answer all questions to get your test result.
1) How many atoms of Hydrogen are present in 5H20?
A
5
B
7
C
2
D
10
2) How many atoms of Carbon are present in 3C2H12N6?
A
2
B
3
C
6
D
12
3) How many atoms of Oxygen are present in H2O?
A
3
B
1
C
2
D
0
4) How many atoms of Calcium are present 2NaCl?
A
3
B
1
C
2
D
4
5) How many atoms of Nitrogen are present in 2NH3?
A
6
B
3
C
2
D
1
6) How many atoms of Hydrogen are present in 2H2O + H3
A
10
B
4
C
7
D
2
7) How many different elements are there present in the compound NH4CO3?
A
9
B
1
C
2
D
4
8) How many atoms of Hydrogen are present in H2SO4?
A
2
B
1
C
6
D
4
9) How many elemetnts are present H2SO4?
A
2
B
3
C
4
D
1
10) Does this follow the Law of conservation of mass? Ag2O ------- Ag + O2?
A
No
B
Yes
*select an answer for all questions
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