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Sagot :
The molarity = 1.716 M
Further explanation
Given
25 ml ethanol
d = 0.789 g/ml
250 ml solution
Required
The molarity
Solution
Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution
[tex]\large{\boxed {\bold {M ~ = ~ \frac {n} {V}}}[/tex]
mass of ethanol :
= 25 ml x 0.789 g/ml
= 19.725 g
mol ethanol :
= 19.725 g : 46 g/mol
= 0.429
The molarity :
= 0.429 : 0.25 L
= 1.716 M
The molarity of ethanol in the solution is 1.716M
What is the molarity of a solution?
Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution
Determine the mass of ethanol :
Mass of ethanol = 25 ml x 0.789 g/ml
Mass of ethanol = 19.725 g
Determine the moles of ethanol
Moles = Mass/Molar mass
Moles = 19.725 g/46 g/mol
Moles of ethanol = 0.429moles
Calculate the molarity using the formula below;
Molarity = Moles/Volume
Molarity = 0.429/0.25 L
Molarity = 1.716 M
Hence the molarity of ethanol in the solution is 1.716M
Learn more on molarity here: https://brainly.com/question/17138838
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