дано
m(ppa HNO3) = 126 g
W(HNO3) = 20%
m(Ba(NO3)2)-?
m(HNO3) = 126 * 20% / 100% = 25.2 g
M(HNO3) = 63 g/mol
n(HNO3) = m/M = 25.2 / 63 = 0.4 mol
BaO+2HNO3--->Ba(NO3)2+H2O
2n(HNO3) = n(Ba(NO3)2)
n(Ba(NO3)2) = 0.4 / 2 = 0.2 mol
M(Ba(NO3)2) = 261 g/mol
m(Ba(NO3)2) = n*M = 0.2 * 261 = 52.2 g
ответ 52.2 г
Объяснение:
дано
m(ppa HNO3) = 126 g
W(HNO3) = 20%
m(Ba(NO3)2)-?
m(HNO3) = 126 * 20% / 100% = 25.2 g
M(HNO3) = 63 g/mol
n(HNO3) = m/M = 25.2 / 63 = 0.4 mol
BaO+2HNO3--->Ba(NO3)2+H2O
2n(HNO3) = n(Ba(NO3)2)
n(Ba(NO3)2) = 0.4 / 2 = 0.2 mol
M(Ba(NO3)2) = 261 g/mol
m(Ba(NO3)2) = n*M = 0.2 * 261 = 52.2 g
ответ 52.2 г
Объяснение: