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Degger [83]
2 years ago
12

An aqueous solution of sodium

Chemistry
2 answers:
DochEvi [55]2 years ago
8 0

Answer:

2.5×10^-7mol/dm^3

Explanation:

Firstly convert the cm^3 to dm^3

200×1000=200000dm^3

Calculate the g/dm^3

2/200000=0.00001g/dm^3

To calculate mol/dm^3

Mol/dm^3=mass given\molar mass

=0.00001/40

=2.5×10^-7mol/dm^3

KATRIN_1 [288]2 years ago
6 0

Answer:

0.25mol/dm^3

Explanation:

Let us calculate the number of mole in 2g of NaOH. This is illustrated below:

Molar Mass of NaOH = 23 + 16 + 1 = 40g/mol

Mass of NaOH given = 2g

Number of mole = Mass /Molar Mass

Number of mole of NaOH = 2/40 = 0.05mole

Volume = 200cm^3

1000cm^3 = 1dm^3

200cm^3 = 200/1000 = 0.2dm^3

Molarity = mole/Volume

Molarity = 0.05/0.2

Molarity = 0.25mol/dm^3

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Explanation:

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Answer:

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Explanation:

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3 years ago
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Explanation:

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4 0
3 years ago
What is the molar mass of cholesterol if 0.00105 mol weigh 0.406 g?
Rudiy27

Answer:

387 g/mol

Explanation:

The molar mass is a ratio comparing a substance's mass and molar value. The specific ratio looks like this:

Molar Mass (g/mol) = mass (g) / moles

You can plug the given values into the ratio to find the molar mass.

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8 0
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As the thermal energy of matter increases, its particles usually spread out, causing
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As the thermal energy of matter increases, its particles usually spread out, causing the substance to expand.

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