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RedDemon59
21.01.2021 •
Chemistry
A sample of crude oil contains 3.09 mM naphthalene, 10.0 mM methylnaphthalene, 23.2 mM dimethylnaphthalene, and 14.4 mM trimethylnaphthalene. What is the total number of moles of all naphthalene compounds combined in 100.0 mL of the oil
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Ответ:
0.00507 moles
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.
where,
n = moles of solute
1. moles of napthalene =![\frac{3.09\times 0.001\times 100.0}{100}=0.000309moles](/tpl/images/1053/3059/48c28.png)
2. moles of methyl napthalene =![\frac{10.0\times 0.001\times 100.0}{1000}=0.001mole](/tpl/images/1053/3059/a4ff4.png)
3. moles of dimethyl napthalene =![\frac{23.2\times 0.001\times 100.0}{1000}=0.00232moles](/tpl/images/1053/3059/d2cda.png)
4. moles of trimethyl napthalene =![\frac{14.4\times 0.001\times 100.0}{1000}=0.00144moles](/tpl/images/1053/3059/d8962.png)
Thus total moles of all naphthalene compounds combined is (0.000309+0.001+0.00232+0.00144) = 0.00507.
Ответ:
B
Explanation:
Gravity helps that person slide down, while kinetic Energy keeps them sliding