Answer:
Sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state. ... The reverse process of sublimation is deposition or desublimation, in which a substance passes directly from a gas to a solid phase.
<span>d. group 3a
is your correct answer</span>
Answer:
Equilibrium constant for the reaction at 25⁰C = 1.81 x 10⁻⁶
Explanation:
Reaction for the Haber's process
N₂(g) + 3 H₂(g) ⇌ 2 NH₃(g)
Free energy change of reaction
ΔGr° = ∑products free energy - ∑reactants free energy
= 2 x (- 16.4) - 0
= - 32.8 KJ / mole
Equilibrium constant for this reaction at 25⁰C
ΔGr° = - 2.303 RT log K
⇒ log K = 
⇒ K = Anti log( -5.74) = 1.81 x 10⁻⁶
Start by writing a simplified reaction sequence between the two elements. For this, we need some electric potential values, which you can find in a table. Adjust based on the source that you are given, because they will differ just a little.
For the reactions, using a reductions table:
Cr3+ + 3e- —> Cd0 E=-0.74
Ag+ + e- —> Ag0. E=0.8
Because Ag+ has a larger E value, the Ag+ will oxidize Cd0 in the following reaction:
3Ag+ + Cr0 —> 3Ag0 + Cd3+
(Notice that three Ag’s are used to work for the transfer of three electrons.)
At the anode, the item in solution is oxidized so that electrons are left behind. This means that the reaction occurring at the anode is the Chromium reaction, and it looks like this:
Cr0(s) —> Cr3+(aq) + 3e-
Answer:
Atomic number ---> number of protons in the nucleus of an atom
Atomic mass ----> the total mass of protons, neutrons, and electrons in an atom
