When the [H+] in a solution is 1.7 × 10−9 M, what is the pOH ? 8.80 5.23 14 8.60
2 answers:
Answer:
pOH = 5.23
Explanation:
<u>Given:</u>
H+ concentration = 1.7*10⁻⁹ M
<u>To determine:</u>
pOH of the solution
<u>Explanation:</u>
pH and pOH measure the H+ and OH- ion concentrations respectively in a given solution and thereby reflect the degree of acidity and basicity of the solution.
pH and pOH are related as follows:
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Answer:
1) Fe = 69.9%
O = 31.1%
2) H = 5.19%
O = 16.5%
N = 28.9%
C = 49.5%
Explanation:
One easy way to do percent compositions is to assume you have 100g of a substance.
1) Lets say we have 100g of Fe2O3.
The total molar mass would be:
The molar mass of the Fe2 alone is:
Thus, the grams of Fe2(out of a 100) could be calculated by multiplying 100g * the molar mass ratio of Fe2 to the whole:
Which is approximately 69.9%.
We can find the amount of O3 by simply subtracting, as the rest of the compound is made of O3. Thus, the % composition of O3 is 31.1%
You can then do this same process to the next question, getting us the following:
H = 5.19%
O = 16.5%
N = 28.9%
C = 49.5%