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user100 [1]
3 years ago
7

How many Joules of energy in 3565 calories? Explain

Chemistry
1 answer:
nignag [31]3 years ago
3 0

Answer:

14915960J

Explanation:

brendatferreira  answered it on another slide this person said they used a converter

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Core electrons shield what from the pull of the nucleus?
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C. Valence electrons

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Please mark my answer as brainliest, I would appreciate it.

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3 years ago
PLEASE PLEASE HELP ME
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the development and use of the ______ a common and important piece of laboratory equipment, led scientist to the discovery of se
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A solution is prepared by dissolving 23.7 g of cacl2 in 375 g of water. the density of the resulting solution is 1.05 g/ml. the
alekssr [168]
<span>The density of the solution =1.05 g/ml.
</span><span>The total mass of the resulting solution is = 398.7 g (CaCl2 + water)
</span>
Find moles of CaCl2 and water.
Molar mass of CaCl2 = 110 (approx.)

Moles of CaCl2 = 23.7 / 110  = 0.22
so, moles of Cl- ion = 2 x 0.22 = 0.44  (because each molecule of CaCl2 will give two Cl- ions)
Moles of water = 375 / 18 = 20.83

Now, Mole fraction of CaCl2 =  (moles of CaCl2) / (total moles)

total moles = moles of Cl- ions + moles of Ca2+ ions + moles of water

                  = 0.44 + 0.22 + 20.83

=21.49


So, mole fraction = 0.44 / (21.49) = 0.02

Guess what !!! density is not used. No need

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