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How many moles of CaCl2(s) is in a sample of calcium chloride?

User Lutaoact
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Answer:

To determine the number of moles of CaCl2(s) in a sample of calcium chloride, we need to know the mass of the sample and the molar mass of CaCl2.

The molar mass of CaCl2 can be calculated as follows:

Atomic mass of Ca = 40.08 g/mol

Atomic mass of Cl (x2) = 35.45 g/mol x 2 = 70.90 g/mol

Molar mass of CaCl2 = 40.08 g/mol + 70.90 g/mol = 110.98 g/mol

So, if we have a sample of calcium chloride with a mass of, for example, 5 grams, we can calculate the number of moles as follows:

Number of moles = mass of sample / molar mass

Number of moles = 5 g / 110.98 g/mol

Number of moles = 0.045 moles (rounded to 3 decimal places)

Therefore, the sample contains 0.045 moles of CaCl2.

Step-by-step explanation:

User Odiljon Djamalov
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