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Pie
3 years ago
13

The mass of a eraser

Chemistry
2 answers:
iren [92.7K]3 years ago
7 0
A quarter of a pound
qaws [65]3 years ago
7 0
A normal-sized pink eraser has a mass of about 21.3 grams.
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Which practice does the Montreal Protocol aim to reduce?
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1. A sample of naproxen has 6.022x10^23 naproxen molecules. How many moles is this?​
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Sugar is easily soluble in water and has a molar mass of 342.30 g/mol. what is the molar concentration of a 252.6 ml aqueous sol
lions [1.4K]

0.811 M is the molar concentration of a 252.6 ml aqueous solution prepared with 70.3 g of sugar.

<h3>Define molarity of a solution.</h3>

Molarity (M) is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per litres of a solution.

Given data:

252.6 mL = 0.2526 L

Next, we shall determine the number of moles of the sugar. This can be obtained as follow:

Molar mass of sugar = 342.30 g/mol.

Mass of sugar = 70.3 g

Mole of sugar =?

Mole =\frac{mass}{molar \;mass}

Mole =  \frac{70.3 g}{342.30}

Mole of sugar = 0.205 mole

Finally, we shall determine the molar concentration of the sugar. This can be obtained as follow:

Mole of sugar = 0.205 mole

Volume =  0.2526 L

Molarity =?

Molarity = \frac{Moles \;solute}{Volume of solution in litre}

Molarity = \frac{0.205 mole}{ 0.2526 L}

Molarity = 0.811 M

Therefore, the molar concentration of the solution is 0.811 M

Learn more about molarity here:

brainly.com/question/2817451

#SPJ1

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