4 years ago

True or false? In a two-column proof, the right column states your reasons.

Chemistry

2 answers:

Natalija [7]4 years ago

6 0

Your answer will be TRUE

ivann1987 [24]4 years ago

6 0

True, left side is for theorems

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How many grams of a 14.0% (w/w) sugar solution contain 62.5<br> of sugar?

Delicious77 [7]

Answer:

$m_{solution}=446.4g$

Explanation:

Hello,

In this case, by-mass percent is computed in terms of the mass of the solute and the mass of the solvent as shown below:

$\% m=\frac{m_{solute}}{m_{solution}} *100\%$

Thus, solving for the mass of the solution, we obtain:

$\frac{x}{y} m_{solution}=\frac{m_{solute}}{\% m}*100\%\\ \\m_{solution}=\frac{62.5g}{14.0\%}*100\% \\\\m_{solution}=446.4g$

Regards.

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3 years ago

one million atoms of a particular element have a mass of 1.99 ×10^-17 grams. how many moles of this element are there?

Marianna [84]

<span>(1.99x10^-17) x 1000000
= 1.99x10^-11 (1.99x10^-11) / (6.023x10^23)
= 3.304001328x10^-35
hope this helps</span>

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3 years ago

How much heat must be absorbed by 375 grams of water to raise its temperature by 25 degrees Celsius? Specific heat for water= 4.

nikklg [1K]

Answer:

$3.9*10^4 J$

Explanation:

See image for explanation!

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3 years ago

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Which of the following statements are true ?

Paha777 [63]

I think the correct answer from the choices listed above is the first option. The statement that is true would be that compounds that can form more hydrogen bonds are more soluble in water. Hope this answers the question. Have a nice day.

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3 years ago

Please Help...............................

dmitriy555 [2]

3 i think..............

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4 years ago