Answer:
water turns from a gas into a liquid forming clouds.
Explanation:
The volume of I- is missing in your question by assuming it = 1L
moles I- = molarity * volume
= 0.00237 * 1 L
= 0.00237 mol
[I-] = moles / total volume
= 0.00237 / 1.625L
= 0.00146 M
moles Pb2+ = molarity * volume
= 0.00785 * 0.625 L
= 0.0049 mol
[Pb2+] = 0.0049 / 1.625L
= 0.003 M
when PbI2(s) ↔ Pb2+(aq) + 2I-(aq)
when Q = [Pb2+][I-]^2 and we neglect [PbI2] as it is solid
∴ Q = 0.003 * (0.00146)^2
= 6.4 x 10^-9
by comparing the value of Q with Ksp value we will found that:
Q < Ksp which mean that more solid will dissolve, and this is an unsaturated solution which has ion concentrations < equilibrium concentrations, so the reaction will go forward until achieving equilibrium.
Hey
Here’s your answer:-
The Stratosphere is responsible for absorbing the most uv radiation.
We can solve this without a concrete formula through dimensional analysis. This works by manipulating the units such that you end up with the unit of the final answer. Manipulate them by cancelling units that appear both in the numerator and denominator side. As a result, we must be left with the units of g. The current in A or amperes is equivalent to amount of Coulombs per second. Since this involves Coulombs, we will use the Faraday's constant which is 96,500 C/mol electron. The reaction is:
Cr³⁺(aq) + 3e⁻ --> Cr(s)
This means that for every 3 moles of electron transferred, 1 mole of Chromium metal is plated. The molar mass of Cr: 52 g/mol. The solution is as follows:
Mass of Chromium metal = (8 C/s)(60 s/1 min)(160 min)(1 mol e⁻/96,500 C)(1 mol Cr/3 mol e)(52 g/mol)
<em>Mass of Chromium metal = 13.79 g</em>
