Объяснение:
M(NaOH)=23+16+1=40 w(Na)=23/40=0.575
M(Ca(OH)2)=40+32+2=74
w(Ca)= 40/74=0.54
M(Al(OH)3)=27+48+3=78
w(Al)=27/78=0.35
M(Sn(OH)4)=119+64+4=187
w(Sn)=119/187=0.64
Объяснение:
M(NaOH)=23+16+1=40 w(Na)=23/40=0.575
M(Ca(OH)2)=40+32+2=74
w(Ca)= 40/74=0.54
M(Al(OH)3)=27+48+3=78
w(Al)=27/78=0.35
M(Sn(OH)4)=119+64+4=187
w(Sn)=119/187=0.64