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miv72 [106K]
2 years ago
9

OVER 200 POINTS- THIS QUESTION IS POSTED TWICE ON MY PROFILE FOR 100 POINTS EACH AND IT IS POSTED A COUPLE TIMES FOR 30 POINTS.

IF YOU KNOW THE ANSWER YOU CAN PUT IT ON ALL THE POSTS AND GET ALL THE POINTS I JUST REALLY NEED HELP. THANKS!
A student dissolves 0.250 mol NaC1 in 2.05 kg H20. What is the molality of the resulting solution? Show your work.
Chemistry
1 answer:
Natali5045456 [20]2 years ago
7 0

Answer:

The molality ( m ) of a solution is the moles of solute divided by the kilograms of solvent. A solution that contains 1.0 mol of NaCl dissolved into 1.0 kg of water is a “one-molal” solution of sodium chloride. The symbol for molality is a lower-case m written in italics.

In order to calculate the molality of a solution divide the moles of solute by the volume of the solution expressed in liters.

I did what I think you meant if it's wrong text me I'll fix it.

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In the chemical reaction, calcium carbonate (CaCO3) was heated to form two new
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Examples of a pure substances
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Answer:

Explanation:

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3 0
2 years ago
Read 2 more answers
What is the pH of a solution in which [H 3O +] = 3.8 × 10 -8 M?
7nadin3 [17]

Answer:

<h3>The answer is 7.42 </h3>

Explanation:

The pH of a solution can be found by using the formula

pH = - log [ { H_3O}^{+}]

From the question we have

pH =  -  log(3.8 \times  {10}^{ - 8} )  \\  = 7.420216...

We have the final answer as

<h3>7.42 </h3>

Hope this helps you

4 0
2 years ago
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