дано
W( HNO3) = 0.12 = 12%
m(Al2O3) = 14 g
m(ppa HNO3)- ?
6HNO3+Al2O3-->2Al(NO3)3+3H2O
M(Al2O3) = 102 g/mol
n(Al2O3) = m/M = 14 / 102 = 0.137 mol
6n(HNO3) = n(Al2O3)
n(HNO3) = 6* 0.137 = 0.822 mol
M(HNO3) = 63 g/mol
m(HNO3) = n*M = 0.822 * 63 = 51.786 g
m(ppaHNO3) = 51.786 * 100% / 12 %= 431.55 g
ответ 431.55 г
Объяснение:
дано
W( HNO3) = 0.12 = 12%
m(Al2O3) = 14 g
m(ppa HNO3)- ?
6HNO3+Al2O3-->2Al(NO3)3+3H2O
M(Al2O3) = 102 g/mol
n(Al2O3) = m/M = 14 / 102 = 0.137 mol
6n(HNO3) = n(Al2O3)
n(HNO3) = 6* 0.137 = 0.822 mol
M(HNO3) = 63 g/mol
m(HNO3) = n*M = 0.822 * 63 = 51.786 g
m(ppaHNO3) = 51.786 * 100% / 12 %= 431.55 g
ответ 431.55 г
Объяснение: