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Burka [1]
3 years ago
5

what is the concentration (molarity) of a solution where 149g of kcl is dissolved in enough water to get a total volume of the s

olution that is 500mls?
Chemistry
1 answer:
Anit [1.1K]3 years ago
4 0
Molar mass KCl = 74.55 g/mol

Number of moles:

mass KC / molar mass

149 / 74.55 => 1.998 moles 

Volume in liters: 500 mL / 1000 => 0.5 L 

Therefore:

M = moles / volume

M = 1.998 / 0.5

M = 3.996 mol/L⁻¹
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(Ques- A) Why does the first method for determining volume work only for a regular-shaped object?

<u>(Ans- A)</u> <em>Because the method requires precise dimensions of objects for result, which is not possible for irregular shaped objects.</em>

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