Answer:
For question 1: Option B is the correct choice.
For question 2: Option D is the right answer.
Explanation:
The average atomic mass is determined by the total of the masses of each isotope, each weighted by their natural fractional abundance.
The formula used to determine average atomic mass is as follows:
The information provided is:
In a sample of 100 atoms of X, 30 have a mass of 125.0 u, and 70 have a mass of 126.0 u. Thus, the fractional abundance of the X-125 isotope is 0.3, while that of the X-126 isotope is 0.7.
Mass = 125
Fractional abundance = 0.3
Mass = 126
Fractional abundance = 0.7
Substituting the values into the equation yields:
Therefore, the answer is Option B.
We know:
The average atomic mass of sulfur = 32.06 u
There are 4 stable isotopes of sulfur: S-32, S-33, S-34, and S-36.
The average atomic mass of sulfur is closer to the mass of the S-32 isotope, indicating that this isotope's relative abundance is greater than that of the others.
The 'S-32' isotope is thus the most abundant isotope of sulfur.
Therefore, the correct response is Option D.
Answer:
Quantity of generated will be reduced to fifty percent of its initial amount.
Explanation:
Equilibrium reaction:
In accordance with the balanced equation, 1 mol of HCl interacts with 1 mol of NaOH leading to the formation of 1 mol of
0.5 mol of HCl interacting with 0.5 mol of NaOH yielding 0.5 mol of .
Consequently, it is clear that the total of produced will be halved if the quantities of the reactants are halved.