Answer:
A-B) 94 %.
C) 17.9 %.
D) 35.8 %.
Explanation:
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A-B) In this case, since the total mass of the mixture is 3.02 g and 1.43g+1.41g=2.84 g are recovered in total, we can compute the percent recovery as shown below:
C) Here, since the solution is made up of NaCl and water, we can say that the mass of the solution is 15g+69g=84g; thus, the percent by mass would be:
D) In this case, we simply divide 26.1 g by 73.0 g in order to obtain the percent:
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Answer:
15 mL of 15% acid solution and 30 mL of 3% acid solution
Explanation:
The total number of moles of the mixture is equivalent to the addition of the number of moles of the first solution and the number of moles of the second solution . Mathematically,
The volume of the mixture = 45 mL
The volume of first solution = x
The volume of second solution = 45 - x
Therefore:
0.15x + 0.03(45-x) = 0.07*45
0.15x + 1.35-0.03x = 3.15
0.12x = 1.8
x = 15
Thus, the volume of the first solution is 15 mL while the volume of the second solution is 30 mL.
Answer:
Explanation:
The equation for the reaction is given as:
At standard conditions; the bond energies are as follows;
Bond Bond Energies (kJ/mol)
C-H 413
F-F 155
C-F 485
H-F 567