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1) ___ 2 NaNO3 + ___ PbO ___ Pb(NO3)2 + ___ Na2O<br />

Na 1<br />

O 3<br />

Pb 1<br />

N 1<br />

x 2 =2<br />

x 2=6+1=7<br />

x 2=2<br />

Na 2<br />

O 7<br />

Pb 1<br />

N 2<br />

2) ___ 6 AgI + ___ Fe2(CO3)3 ___ 2 FeI3 + ___ 3 Ag2CO3<br />

Ag 1x 6 =6<br />

I 1x6 =6<br />

Fe 2<br />

C 3<br />

O 9<br />

Ag 2<br />

I 3x2=6<br />

Fe 1x2=2<br />

C 1x3=3<br />

O3x3=9<br />

3) ___ C2H4O2 + ___ 2 O2 ___ 2 CO2 + ___ 2 H2O<br />

C2<br />

H4<br />

O4x2=8<br />

C1x2=2<br />

H2x2=4<br />

O2x4=8<br />

4) ___ ZnSO4 + ___ Li2CO3 ___ ZnCO3 + ___ Li2SO4<br />

IT'S GOOD ;)<br />

5) ___ V2O5 + ___ 5 CaS ___ 5 CaO + ___ V2S5<br />

V2<br />

O5<br />

Ca1x5=5<br />

S1x5=5<br />

V2<br />

O1x5=5<br />

Ca 1x5=5<br />

S5<br />

Pg93

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