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3 years ago

Help please!!!! I only have a couple mins

Chemistry

2 answers:

svlad2 [7]3 years ago

8 0

Answer:-D

Explanation:

Kaylis [27]3 years ago

3 0

Answer:

D i am prety shure

Explanation:

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3 years ago

If a liter of water is cooled from 50 to 30 what happens to its volume

dangina [55]

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Give an example where handpicking is used for separation. (1)

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2 years ago

A chemical test has determined the concentration of a solution of an unknown substance to be 2.41 M. a 100.0 mL volume of the so

Oksana_A [137]

Answer : The molar mass of unknown substance is, 39.7 g/mol

Explanation : Given,

Mass of unknown substance = 9.56 g

Volume of solution = 100.0 mL

Molarity = 2.41 M

Molarity : It is defined as the number of moles of solute present in one liter of volume of solution.

Formula used :

$\text{Molarity}=\frac{\text{Mass of unknown substance}\times 1000}{\text{Molar mass of unknown substance}\times \text{Volume of solution (in mL)}}$

Now put all the given values in this formula, we get:

$2.41M=\frac{9.56g\times 1000}{\text{Molar mass of unknown substance}\times 100.0mL}$

$\text{Molar mass of unknown substance}=39.7g/mol$

Therefore, the molar mass of unknown substance is, 39.7 g/mol

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3 years ago