<span>The hardest known mineral is diamond.
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Answer:
The reaction will be non spontaneous at these concentrations.
Explanation:
Expression for an equilibrium constant :
Solubility product of the reaction:
Reaction between Gibb's free energy and equilibrium constant if given as:
Gibb's free energy when concentration and
Reaction quotient of an equilibrium = Q
- For reaction to spontaneous reaction: .
- For reaction to non spontaneous reaction: .
Since ,the value of Gibbs free energy is greater than zero which means reaction will be non spontaneous at these concentrations
This was because the experiment showed that a substance could emit radiation even while it was not exposed to light.
Oak tree, because it’s the primary producer
Answer:
19.4 g of alum, will be its theoretical yield
Explanation:
The reaction is:
2 Al + 2 KOH + 4 H₂SO₄ + 22H₂O → 3H₂ + 2KAl(SO₄)₂•12H₂O
Let's determine the amount of acid.
M are the moles contained in 1 L of solution or it can be mmoles that are contained in 1 mL of solution
M = mmol /mL
M . mL = mmol
We replace: 8.3 mL . 9.9 M = 82.17 mmoles
We convert to moles: 82.17 mmol . 1 mol / 1000mmol = 0.082 moles
Ratio is 4:2
4 moles of sulfuric acid can make 2 moles of alum
By the way, 0.082 moles of acid may produce ( 0.082 . 2) /4 = 0.041085 moles.
We convert moles to mass:
Molar mass of alum is: 473.52 g/mol.
0.041085 moles . 473.52 g/mol = 19.4 g