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3 years ago

Polar substances will usually dissolve in _____.

2 answers:

7 0

Hello!

When we want to dissolve something, we need a solvent in order to do it. So if we have a polar substance, we will need a polar solvent in order to dissolve it.

Polar substances will usually dissolve in polar solvents.

You can feel free to let me know if you have any questions regarding this!
Thanks!

- TetraFish

leva [86]3 years ago

5 0

Polar solvents
hope it helps

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Answer:

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For b: The number of molecules of gas is $2.83\times 10^{22}$

Explanation:

For a:

To calculate the number of moles, we use the equation given by ideal gas follows:

$PV=nRT$

where,

P = pressure of the air = 1.00 atm

V = Volume of the air = 1200 mL = 1.2 L (Conversion factor: 1 L = 1000 mL)

T = Temperature of the air = $37^oC=[37+273]K=310K$

R = Gas constant = $0.0821\text{ L. atm }mol^{-1}K^{-1}$

n = number of moles of air = ?

Putting values in above equation, we get:

$1.00atm\times 1.2L=n_{air}\times 0.0821\text{ L atm }mol^{-1}K^{-1}\times 310K\\n_{air}=\frac{1.00\times 1.2}{0.0821\times 310}=0.047mol$

Hence, the number of moles of air present in the RV is 0.047 moles

For b:

According to mole concept:

1 mole of a compound contains $6.022\times 10^{23}$ number of molecules.

So, 0.047 moles of air will contain $(0.047\times 6.022\times 10^{23})=2.83\times 10^{22}$ number of gas molecules.

Hence, the number of molecules of gas is $2.83\times 10^{22}$

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2 years ago

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Explanation:

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2 years ago

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3 years ago

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Given:
M1 = 6.5 kg of books
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