2 years ago

Air movement can affect how quickly evaporation occurs. O True O False

Chemistry

1 answer:

-BARSIC- [3]2 years ago

3 0

False, air movement as no control over how quickly it occurs

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Food shelter oxygen

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What is the total number of calories of heat energy absorbed when 10 grams of water is vaporized at its normal boiling point

Darya [45]

Answer: The amount of energy absorbed by water is 5390 Calories

Explanation:

To calculate the amount of heat absorbed at normal boiling point, we use the equation:

$q=m\times L_{vap}$

where,

q = amount of heat absorbed = ?

m = mass of water = 10 grams

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Putting values in above equation, we get:

$q=10g\times 539Cal/g=5390Cal$

Hence, the amount of energy absorbed by water is 5390 Calories

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3 years ago

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mariarad [96]

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Sandy was cooking beans for dinner and heard they cook faster if baking soda is added to the water. is adding baking soda a good

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3 years ago

How many grams of NaCI per kilogram of water are present in a 2.7 molal aqueous solution

navik [9.2K]

Answer:

157.79 g

Explanation:

The definition of molality is:

molality = moles of solute / kilogram of solvent

This means that in a 2.7 molal solution, there are 2.7 moles of NaCl per kilogram of water.

So now we convert those 2.7 moles of NaCl to grams, using its molar mass:

2.7 mol * 58.44 g/mol = 157.79 g

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3 years ago