1)
дано
m(ppa H2SO4) = 200 g
W(H2SO4) = 10%
----------------------
m(H2SO4)-?
m(H2SO4) = m(ppa H2SO4) * W(H2SO4) / 100% = 200*10/100 = 20 g
ответ 20 г
2)
V = 1L
Cм = 2M
---------------------
Cm = m(H2SO4) / M(H2SO4) * V
m(H2SO4) = C*M*V = 2*98*1 = 196 g
ответ 196 г
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Answers & Comments
1)
дано
m(ppa H2SO4) = 200 g
W(H2SO4) = 10%
----------------------
m(H2SO4)-?
m(H2SO4) = m(ppa H2SO4) * W(H2SO4) / 100% = 200*10/100 = 20 g
ответ 20 г
2)
дано
V = 1L
Cм = 2M
---------------------
m(H2SO4)-?
Cm = m(H2SO4) / M(H2SO4) * V
m(H2SO4) = C*M*V = 2*98*1 = 196 g
ответ 196 г