Răspunsuri

2014-09-02T17:27:47+03:00
A)cM=m NaOH/masa molara NaOH * volumul = 400/40 * 5 = 2 M
b)c%=md/ms*100=196/200*100 = 98%
cM=c%*ro*10/masa molara H2SO4 = 98*1,84*10/98 = 18,4M