дано
W(NaOH) = 20%
m(ppa HNO3) =50 g
W(HNO3) = 63%
m(ppa NaOH) - ?
m(HNO3) = m(ppa HNO3)*W(HNO3) / 100% = 50 *63 / 100% = 31.5 g
NaOH + HNO3-->NaNO3 + H2O
M(HNO3) = 63g/mol
n(HNO3) = m/M = 31/5 / 63= 0.5 mol
n(HNO3) = n(NaOH)
M(NaOH) = 40 g/mol
m(NaOH) = n(NaOH) * M(NaOH) = 0.5 * 40 = 30 g
m(ppa NaOH) = m(NaOH) * 100% / W(NaOH) = 30 * 100% / 20% = 150 g
ответ 150 гр
Объяснение:
ответ: 9 по моему
дано
W(NaOH) = 20%
m(ppa HNO3) =50 g
W(HNO3) = 63%
m(ppa NaOH) - ?
m(HNO3) = m(ppa HNO3)*W(HNO3) / 100% = 50 *63 / 100% = 31.5 g
NaOH + HNO3-->NaNO3 + H2O
M(HNO3) = 63g/mol
n(HNO3) = m/M = 31/5 / 63= 0.5 mol
n(HNO3) = n(NaOH)
M(NaOH) = 40 g/mol
m(NaOH) = n(NaOH) * M(NaOH) = 0.5 * 40 = 30 g
m(ppa NaOH) = m(NaOH) * 100% / W(NaOH) = 30 * 100% / 20% = 150 g
ответ 150 гр
Объяснение:
ответ: 9 по моему
Объяснение: