Answer:
25.35%
Explanation:
Again let me restate the the equation of the reaction;
H2O (ℓ) + 2 MnO4 - (aq) + 3 CN- (aq) → 2 MnO2 (s) + 3 CNO- (aq) + 2 OH- (aq)
Amount of potassium permanganate reacted = 10.2/1000 * 0.08035 = 8.1957 * 10^-4 moles
If 2 moles of MnO4 - reacts with 3 moles of CN-
8.1957 * 10^-4 moles of MnO4 - reacts with 8.1957 * 10^-4 * 3/2
= 1.229 * 10^-3 moles of CN-
Mass of CN- reacted = 1.229 * 10^-3 moles of CN- * 26.02 g/mol
= 0.03 g
Hence, percentage of the cyanide = 0.03 g/0.1183 g * 100
= 25.35%
Answer:
Through their adaptations from their habitat; environment
Explanation:
Charles Darwin explains evolution and their genetic material evolves during the process. For example, fruit birds have narrow bills whilst seed-eating birds have big bills. The foods they eat forced their DNA to adapt with the system in order to survive.
The balanced chemical reaction is:
<span>CuCl2 + 2Na → 2NaCl + Cu
We are given the amount of sodium to be used up in the reaction. This will be the starting point for our calculations.
15 g Na ( 1 mol / 22.99 ) ( 1 mol Cul2 / 2 mol Na ) (134.45 g / 1 mol ) = 43.86 g CuCl2 needed to be able to obtain the maximum amount of copper.</span>
The answer is 451.4124 argon
Law of superposition
Principle of cross-cutting
Explanation:
The geologic precepts that would be used to determine the relative ages of the rock strata are the law of superposition of strata and the principle of cross-cutting.
- The law of superposition of strata states that "in an undisturbed sequence of rock strata, the oldest layer is usually at the bottom and the youngest on top".
- From this law we understand that the oldest layer will be at the bottom if the rock has not been disturbed.
- Here the rock has been disturbed by folding and we need to unravel to fold and see how the rock sequence originally was laid.
The principle of cross-cutting states that "faults are younger than the rocks they cut through". Structures in rocks are younger than rock layers they cut through.
A fault or joint will only pass through a rock that has been formed before it occurred. Subsequent rocks will be younger than the fault.
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