whatsupp123
05.10.2019 •
Chemistry
Ddt, an insecticide banned in the united states for most uses, has the formula c14h9cl5. find its percent composition.
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Ответ:
12.011 c * 14
1.008 h * 9
35.453 cl * 5
total should be composition of that element
Ответ:
0.0344 moles and 1.93g.
Explanation:
Molarity is defined as the ratio between moles of a solute (In this case, KOH), and the volume. With molarity and volume we can solve the moles of solute. With moles of solute we can find mass of the solute as follows:
Moles KOH:
15.2mL = 0.0152L * (2.26mol / L) = 0.0344moles
Mass KOH:
0.0344 moles * (56.11g/mol) = 1.93g of KOH