Question

Suppose you have 250.0 mL of a 0.350 M sodium hydroxide solution. How many moles of sodium hydroxide are in the solution?

Answer 1

Explanation:

number of moles can be derived from molarity law as shown in the figure

Answer 2

The number of moles of sodium hydroxide are in the solution should be considered as the 0.0875 moles.

Calculation of the number of moles:

Since there is 50.0 mL of a 0.350 M sodium hydroxide solution.

So here the no of moles should be

$= Molarity * volume\\\\= 250 *10^-3 * 0.350$

= 0.0875 moles

hence, The number of moles of sodium hydroxide are in the solution should be considered as the 0.0875 moles.

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