Ответы на вопрос:
дано
V(H2SO4) = 500 mL
p(H2SO4) = 1.12 g/mL
W(H2SO4) = 15%
+Na
-------------------
V(H2)-?
m(H2SO4) = V(H2SO4) * p(H2SO4) * W(H2SO4) / 100% = 500 * 1.12 * 15% / 100% = 84 g
H2SO4+2Na-->Na2SO4+H2
M(H2SO4) = 98 g/mol
n(H2SO4) = m/M = 84 / 98 = 0.857 mol
n(H2SO4) = n(H2) = 0.857 mol
V(H2) = n*Vm = 22.4 * 0.857 = 19.2 L
ответ 19.2 л
Объяснение:
Популярно: Химия
-
luhxor05.07.2020 06:05
-
rusrusik29.09.2020 18:42
-
us0504200728.06.2020 22:13
-
firstoneking121.02.2021 23:02
-
megadens1024.06.2022 20:41
-
bubles1319.04.2023 01:04
-
Студент7165303.09.2020 15:25
-
korobkovaangelina03.10.2020 16:41
-
elizavetachery10.08.2021 14:37
-
jil35608.11.2022 23:30