Answer:
468 h
Explanation:
Let's consider the reduction of chromium (III) to chromium that occurs in the electrolytic purification.
Cr³⁺ + 3 e⁻ → Cr
We can establish the following relations.
- 1 kg = 1,000 g
- The molar mass of Cr is 52.00 g/mol
- 1 mole of Cr is deposited when 3 moles of electrons circulate
- The charge of 1 mole of electrons is 96,468 c (Faraday's constant)
- 1 A = 1 c/s
- 1 h = 3,600 s
The hours that will take to plate 11.5 kg of chromium onto the cathode if the current passed through the cell is held constant at 38.0 A is:
Answer:
The formula of the gas produced is
, and the balanced equation is :
Explanation:
The chemical reaction between lithium nitride and water gives lithium hydroxide and ammonia gas. The chemical equation of this reaction will be given as:
And when sodium phosphide reacts with water is gives an aqueous solution of sodium hydroxide and hydrogen phosphide gas also called phosphine gas.
The chemical equation of this reaction will be given as:
The formula of the gas produced is, and the balanced equation is :
Answer: 3.26x10^5L
Explanation:
P1 = 101kPa
P2 = 95kPa
T1 = 27°C = 27 +273 =300k
T2 = —10°C = —10 +273 = 263k
V1 = 3.5 x 10^5 L
V2 =?
P1V1 / T1 = P2V2 /T2
(101 x 3.5 x 10^5)/300 = (95xV2)/263
300x95xV2 = 101x 3.5x10^5x263
V2 = (101x 3.5x10^5x263) /(300x95)
V2 = 3.26x10^5L
Answer:
Condensation: 423.3 K
Freezing: 83.96 K
(this is all i could figure out :) hope it helps)
Answer:
Heating a substance increases the speed at which molecules move.
Explanation:
