Answer:
5.0 moles.
Explanation:
- The balanced equation of the reaction between hydrogen and oxgen to produce water is:
<em>H₂ + 1/2O₂ → H₂O.</em>
- It is clear that 1.0 mole of H₂ reacts with 0.5 mole of O₂ to produce 1.0 mole of H₂O.
∴ 2.5 mole of O₂ will react with 5.0 moles of H₂.
- The limiting reactant is O₂ and H₂ is found in excess (1.0 mole more).
From the stichiometry: 2.5 mole of O₂ will react with 5.0 moles of H₂ to produce 5.0 moles of H₂O.
<em>∴ 5.0 moles of water are produced when 6.0 moles of hydrogen gas react with 2.5 moles of oxygen gas</em>
Answer:
3.4moles
Explanation:
Given parameters:
Number of molecules = 2.04 x 10²⁴
Unknown: Number of moles
Solution
We use the concept of mole to solve this kind of problem.
A mole is the amount of substance that contains Avogadro's number of particle i.e 6.02 x 10²³ molecules
Solving
For elementary particles:
Number of moles =
¹ molecules
Number of moles = ![\frac{2.04 x 10^{24} }{6.02 x ^{23} }](https://tex.z-dn.net/?f=%5Cfrac%7B2.04%20x%2010%5E%7B24%7D%20%7D%7B6.02%20x%20%5E%7B23%7D%20%7D)
Number of moles of H₂O = 0.34 x 10¹ = 3.4moles
T = 14400 s
26.5 x 14400=381600 C
381600/96500=3.95 Faradays
Cu2+ + 2e- = Cu
3.95 faradays ( 1 mol/ 2 Faradays) = 1.97
mass = 1.97 x 63.55 g/mol=125 g
moles Au = 33.1 / 196.967 g/mol=0.168
Au+ + 1e- = Au
0.168 ( 1 Faraday/ 1mol)= 0.168 Faraday
0.168 x 96500=16217 Coulombs
16217 / 5.00=3243 s => 54 min