Which is a example of a chemical reaction A) Melting Ice B) Rusting Iron C) Water evaporating D) Rubbing a water on paper Please
1 answer:
You might be interested in
Answer:
Chlorine takes electrons from potassium in the reaction.
Explanation:
2K + Cl₂ ⟶ 2KCl
The KCl is an ionic solid.
It consists of K⁺ and Cl⁻ ions that are formed by the transfer of an electron from K to Cl.
The chlorine takes electrons from potassium, and Gain of Electrons is Reduction.
At the same time, potassium loses electrons to chlorine, and Loss of Electrons is Oxidation.
Both oxidation and reduction are occurring, so this is an oxidation-reduction reaction.
This problem is describe the mole-ratio composition of an allow composed by tin, lead and cadmium. Ratios are given as Sn:Pb 2.73:1.00 and Pb:Cd is 1.78:1.00, and we are asked to calculate the mass percent compositon of Pb in the allow.
In this case, according to the given information, it turns out possible realize that the following number of moles are present in the alloy, according to the aforementioned ratios:
Next, we calculate the masses by using each metal's atomic mass:
Thus, the mass percent composition of each metal is shown below:
So that of lead is 34.9 %.
Learn more: