Which of the following units would be the most appropriate for measuring the mass of a grain of rice? A. milligrams B. grams C.
2 answers:
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Answer:
Explanation:
Hello,
In this case, since the chemical reaction is:
We can see that hydrochloric acid and magnesium hydroxide are in a 2:1 mole ratio, which means that the neutralization point, we can write:
In such a way, the moles of magnesium hydroxide (molar mass 58.3 g/mol) in 500 mg are:
Next, since the pH of hydrochloric acid is 1.25, the concentration of H⁺ as well as the acid (strong acid) is:
Then, since the concentration and the volume define the moles, we can write:
Therefore, the neutralized volume turns out:
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Answer:
Pb(s), Fe(s) and Zn(s) will reduce to
Fe(s) and Zn(s) will reduce to
Explanation:
Standard reduction potential denotes ability to consume electrons from another species.
Hence, higher the standard reduction potential, higher will be the ability to oxidize another species.
Metal with value lower than 1.51 V will donate electron to
and thus reduces
to
.
So, Pb(s), Fe(s) and Zn(s) will reduce to
.
Metal with value lower than -0.40 V will donate electron to
and thus reduces
to
.
So, Fe(s) and Zn(s) will reduce to
.