Question

Please help me with my quiz?

1.) Which coefficients balance this equation?
_H2 + _N2 -> _NH3
A. 1, 2, 3
B. 2, 3, 2
C. 3, 1, 2
D. 4, 1, 3
2.) Which chemical equation is balanced?
A. K2O + H2O -> KOH
B. K2O + H2O -> 2KOH
C. K2O + 2H2O -> 2KOH
D. 2K2O + 2H2O -> 2KOH
3.) Which chemical equation is balanced?
A. CO2 + 4H2 -> CH4 + 2H2O
B. 4CO2 + H2 -> CH4 + 2H2O
C. CO2 + 4H2 -> 2CH4 + 2H2O
D. 2CO2 + 2H2 -> 2CH4 + 2H2O
4.) Which coefficients balance this equation?
_CH4 + _O2 -> _CO2 + _H2O
A. 1, 1, 1, 1
B. 1, 1, 2, 1
C. 1, 2, 1, 2
D. 2, 1, 2, 1
5.) Which coefficients balance this equation?
_Al + _O2 -> _Al2O3
A. 2, 3, 1
B. 3, 2, 2
C. 4, 2, 2
D. 4, 3, 2

Answer 1

The solutions would be :
1. C
2. B
3. A
4. C
5. D.