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urgent dau 30 de puncte !!​

Urgent Dau 30 De Puncte class=

Răspuns :

Răspuns:

MNaOH=23+16+1=40g/mol

MNaCl =23+35,5=58,5g/mol

40g.......................58,5g

NaOH + HCl => NaCl + H2O

0,4g.........................xg

x=0,4×58,5/40=calculează