H2O - apă
MH2O = 2AH+AO=2*1+16=18g/mol
raport atomic => 2:1
raport de masa => 2g:16g=1g:8g
HCl- acid clorhidric
MHCl=AH+ACl=1+35.5=36.5g/mol
raport atomic => 1:1
raport de masa => 1g:35.5g
NH3 - amoniac
MNH3=AN+3AH=14+3*1=17g/mol
raport atomic => 1:3
raport de masă => 14g:3g
℅N=14/17*100=
℅H=3/17*100=
NaOH - hidroxid de sodiu
MNaOH=ANa+AO+AH=23+16+1=40g/mol
raport atomic => 1:1:1
raport de masa => 23:16:1
℅Na=23/40*100=
℅O=16/40*100=
℅H=1/40*100=
H2SO4 - acid sulfuric
MH2SO4=98g/mol
raport atomic => 2:1:4
raport de masa => 2:32:64=1:16:32
℅H=2/98*100=
℅S=32/98*100=
℅O=64/98*100=
NaCl - clorură de sodiu
MNaCl=58.5g/mol
raport atomic => 1:1
raport de masa => 23:35.5
℅Na=23/58.5*100=
℅Cl=35.5/58.5*100=
H3PO4 - acid fosforic
MH3PO4=98g/mol
raport atomic => 3:1:4
raport de masă => 3:31:64
CaO - oxid de calciu
MCaO=56g/mol
raport atomic => 1:1
raport de masa => 40:16=20:8=10:4=5:2
Al2(SO4)3 - sulfat de aluminiu
MAl2(SO4)3 = 2AAl+3(AS+4AO) = 2*27+3(32+4*16)=342g/mol
raport atomic => 2:3:12
raport de masa => 54:96:192=9:16:32
HBr - acid bromhidric
MHBr=81g/mol
raport atomic => 1:1
raport de masă => 1:80
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