AthenAt5607
03.12.2021 •
Social Studies
One demographic change that took place in the U.S. in the mid 19th century was an increase in
es )
A)
the number of Irish immigrants due to the potato famine.
B)
the number of British immigrants seeking religious freedom.
the number of Native Americans due to better political policies,
D)
the number of Mexican immigrants due to increase in factory jobs
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Ответ:
C. 4x10⁻⁴ mol / (Ls)
Explanation:
Based in the reaction:
5 H₂O₂(aq) + 2 MnO₄⁻(aq) + 6 H⁺(aq) → 2 Mn²⁺(aq) + 8 H₂O(l) + 5 O₂(g)
2 moles of MnO₄⁻ disappears while 5 moles of O₂ appears.
If 5 moles appears in a rate of 1.0x10⁻³mol /(Ls), 2 moles will disappear:
2 moles ₓ (1.0x10⁻³mol /(Ls) / 5 moles) = 4x10⁻⁴ mol / (Ls)
Right answer is:
C. 4x10⁻⁴ mol / (Ls)