2 years ago

Science question down below

Chemistry

1 answer:

tankabanditka [31]2 years ago

3 0

The first solution or a I think is the correct answer

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50.0 grams of KCl is dissolved in water to make a 4.00 L

xeze [42]

Answer:0.1677M

Explanation:

Molarity=moles/volume

Number of moles =mass/molar mass

Once you get the number of moles, you apply it to the molarity formula.

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3 years ago

A 4Kg rock is rolling 10m/s find it’s kinetic energy

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KE=.5mv^2
M=mass
v=velocity
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3 years ago

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2 years ago

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3 years ago

A solution contains 45 grams of nitrogen gas and 40 grams of argon. What is the mole fraction of argon in this solution?

Katarina [22]

<span>0.38

You first calculate the total moles by dividing the grams by molecular weight:
45 g N2 / 28.02 g/mol = 1.6 mol N2
40 g Ar / 39.95 g/mol = 1.0 mol

Then you divide the moles of Ar by the total number of moles:
1.0 / (1.6 + 1.0) = 0.38 mol fraction</span>

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3 years ago