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arlik [135]
3 years ago
15

Wind is related to the movement of warm and cold air masses. Which kind of heat transfer does this represent?

Chemistry
1 answer:
oksano4ka [1.4K]3 years ago
3 0
I assume you meant to write convection for one of those answers. Convection is the way that heat is transferred through liquids and gases.
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If i have 340mL of a 1.5 M NaBr solution, What will the concentration be for 1000mL?
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Answer:

0.51M

Explanation:

Given parameters:

Initial volume of NaBr = 340mL

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Final volume  = 1000mL

Unknown:

Final molarity = ?

Solution;

This is a dilution problem whereas the concentration of a compound changes from one to another.

In this kind of problem, we must establish that the number of moles still remains the same.

    number of moles initially before diluting = number of moles after dilution

Number of moles  = Molarity x volume

Let us find the number of moles;

          Number of moles  = initial volume x initial molarity

Convert mL to dm³;

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Number of moles  = initial volume x initial molarity  = 0.34 x 1.5 = 0.51moles

Now to find the new molarity/concentration;

               Final molarity  = \frac{number of moles}{Volume}    = \frac{0.51}{1}    = 0.51M

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