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How many atoms of Oxygen are present in H2O?
1
7
10
2
2
No
4
3
Does this follow the Law of conservation of mass? Ag2O ------- Ag + O2?
1
7
10
2
2
No
4
3
How many different elements are there present in the compound NH4CO3?
1
7
10
2
2
No
4
3
How many atoms of Hydrogen are present in 2H2O + H3
1
7
10
2
2
No
4
3
How many atoms of Hydrogen are present in 5H20?
1
7
10
2
2
No
4
3
How many atoms of Calcium are present 2NaCl?
1
7
10
2
2
No
4
3
How many atoms of Nitrogen are present in 2NH3?
1
7
10
2
2
No
4
3
How many elemetnts are present H2SO4?
1
7
10
2
2
No
4
3
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