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3 years ago

The freezing point of a solution the freezing point of the pure solvent

Chemistry

2 answers:

nignag [31]3 years ago

6 0

Answer:

Freezing Point Depression. The freezing point of a solution is less than the freezing point of the pure solvent. This means that a solution must be cooled to a lower temperature than the pure solvent in order for freezing to occur

babymother [125]3 years ago

5 0

Answer:

This means that a solution must be cooled to a lower temperature than the pure solvent in order for freezing to occur.

Explanation:

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If you have 8.45 x 10^27 molecules of H2O, how many moles of water do you have?

il63 [147K]

Answer:

<h3>The answer is 14036.54 moles</h3>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

$n = \frac{N}{L} \\$

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question

N = 8.45 x 10^27 molecules of H2O

We have

$n = \frac{8.45 \times {10}^{27} }{6.02 \times {10}^{23} } \\ = 14036.544850...$

We have the final answer as

<h3>14036.54 moles</h3>

Hope this helps you

7 0

3 years ago

Please help me!! thank you so much!!

Elis [28]

Answer:

13.75

Explanation:

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4 0

4 years ago

Which is a FALSE statement about the possible benefits of nanocars? A. They could work together to build really complex things.

kondor19780726 [428]

C, they could work together to make things from the top down.

6 0

3 years ago

in a sample of silcon 92.21% of the atoms have a mass of 27.98 amu, 4.70% have a mass of 28.98 amu and 3.09% have a mass of 29.9

oksano4ka [1.4K]

Answer: 28.1 amu

Explanation:

Mass of isotope 1 = 27.98 amu

% abundance of isotope 1 = 92.21% = $\frac{92.21}{100}=0.9221$

Mass of isotope 2 = 28.98 amu

% abundance of isotope 2 = 4.70% = $\frac{4.70}{100}=0.047$

Mass of isotope 3 = 29.97 amu

% abundance of isotope 2 = 3.09% = $\frac{3.09}{100}=0.0309$

Formula used for average atomic mass of an element :

$\text{ Average atomic mass of an element}=\sum(\text{atomic mass of an isotopes}\times {{\text { fractional abundance}})$

$A=\sum[(27.98 )\times 0.922+(28.98)\times 0.047+(29.97)\times 0.0309]$

$A=28.1amu$

Therefore, the average atomic mass of silicon is 28.1 amu

5 0

3 years ago

Which word equation shows hydrogen reacting with oxygen to form water?

LenaWriter [7]

Answer:

O2+H2 → H2O

become→zero to−2

∵ it will be reduced and oxidation state of H

becomes zero to +1 it will be oxidised.

∴ reaction will be redox

Explanation:

please mark me as brainalist

5 0

2 years ago