1.Mr( AlPO4)= Ar(Al)*Ar(P)*Ar(O)*4= 27 + 31 + 64 = 122
Mr( Na20) = Ar(Na)* Ar(O)*2 = 23 + 32 = 56
Mr( MgH2) = Ar(Mg)* (H)*2 = 24 + 2 = 26
2. Mr(H2SO4) = Ar(H)*2*Ar(S)*Ar(O)*4= 2+ 32 + 64= 98
W(H) = [tex]\frac{Ar(H)*2}{Mr(H2SO4} = \frac{2}{98} = 0,02= 2%[/tex]%
W(S)= [tex]\frac{Ar(S)}{Mr(H2SO4)} = \frac{32}{98} =0,32= 32%[/tex]%
W(O)=[tex]\frac{Ar(O)*4}{Mr(H2SO4)} = \frac{64}{98} = 0,65 = 65%[/tex]%
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Answers & Comments
1.Mr( AlPO4)= Ar(Al)*Ar(P)*Ar(O)*4= 27 + 31 + 64 = 122
Mr( Na20) = Ar(Na)* Ar(O)*2 = 23 + 32 = 56
Mr( MgH2) = Ar(Mg)* (H)*2 = 24 + 2 = 26
2. Mr(H2SO4) = Ar(H)*2*Ar(S)*Ar(O)*4= 2+ 32 + 64= 98
W(H) = [tex]\frac{Ar(H)*2}{Mr(H2SO4} = \frac{2}{98} = 0,02= 2%[/tex]%
W(S)= [tex]\frac{Ar(S)}{Mr(H2SO4)} = \frac{32}{98} =0,32= 32%[/tex]%
W(O)=[tex]\frac{Ar(O)*4}{Mr(H2SO4)} = \frac{64}{98} = 0,65 = 65%[/tex]%