Oblicz procent masowy metali w solach AlCl3 Na2SO4 PB(NO)3
AlCl3M Al= 27g/molM Cl= 35,5 g/molM AlCl3= 133,5 g/mol
27:133,5= 0,202 0,202*100= 20%
Na2SO4
M 2Na= 46g/molM SO4= 96g/molM Na2SO4= 142g/mol46:142=0,323 0,323*100=32%
Pb(NO)3M Pb= 207g/molM 3(NO)= 90g/mol
M Pb(NO)3= 297g/mol
207:297=0,6969 0,69*100= 70%
zamiast g/mol można pisać unit (u)
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AlCl3
M Al= 27g/mol
M Cl= 35,5 g/mol
M AlCl3= 133,5 g/mol
27:133,5= 0,202 0,202*100= 20%
Na2SO4
M 2Na= 46g/mol
M SO4= 96g/mol
M Na2SO4= 142g/mol
46:142=0,323 0,323*100=32%
Pb(NO)3
M Pb= 207g/mol
M 3(NO)= 90g/mol
M Pb(NO)3= 297g/mol
207:297=0,6969 0,69*100= 70%
zamiast g/mol można pisać unit (u)