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Balancing Equations - Quiz - gcsescience.com.
1.
In the formula KCl there are
a) 1 potassium and 2 chlorines
b) 2 potassiums and 1 chlorine
c) 1 potassium and 1 chlorine
d) 2 potassiums and 2 chlorines
2.
The balanced equation for the reaction
of potassium with chlorine is
a) K + Cl > KCl
b) K + Cl
2
> KCl
2
c) K + Cl
2
> 2KCl
d) 2K + Cl
2
> 2KCl
3.
In the formula MgBr
2
there are
a) 2 magnesiums and 2 bromines
b) 1 magnesium and 2 bromines
c) 2 magnesiums and 1 bromine
d) 1 magnesium and 1 bromine
4.
The balanced equation for the reaction
of magnesium with bromine is
a) Mg + Br > MgBr
2
b) Mg + Br
2
> MgBr
2
c) 2Mg + 2Br > MgBr
2
d) 2Mg + Br > MgBr
2
5.
In the formula Na
2
O there are
a) 2 sodiums and 1 oxygen
b) 2 sodiums and 2 oxygens
c) 1 sodium and 1 oxygen
d) 1 sodium and 2 oxygens
6.
The balanced equation for the reaction
of sodium with oxygen is
a) 2Na + O
2
> Na
2
O
b) 2Na + O > Na
2
O
c) 4Na + O
2
> 2Na
2
O
d) Na + O
2
> Na
2
O
7.
The balanced equation for the reaction
of iron oxide with carbon monoxide (in the blast furnace) is
a) Fe
2
O
3
+ 2CO > Fe + CO
2
b) Fe
2
O
3
+ 2CO > 2Fe + 2CO
2
c) Fe
2
O
3
+ 3CO > 2Fe + 3CO
2
d) 2Fe
2
O
3
+ 4CO > 3Fe + 4CO
2
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