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Calculate the number of moles when 50g of copper (II) sulfate crystals, CuSO4.5H2O

User Sevim
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1 Answer

1 vote

Step-by-step explanation:

To calculate the number of moles of copper (II) sulfate crystals (CuSO4.5H2O) in 50g, we first need to find the molar mass of CuSO4.5H2O.

The molar mass of CuSO4 is:

Cu: 63.55 g/mol

S: 32.06 g/mol

O (4 atoms): 15.99 g/mol x 4 = 63.96 g/mol

H2O (5 molecules): 18.02 g/mol x 5 = 90.10 g/mol

Therefore, the molar mass of CuSO4.5H2O is:

Molar mass = (63.55 + 32.06 + 63.96 + 90.10) g/mol

= 249.67 g/mol

Next, we can use the formula:

number of moles = mass / molar mass

where mass is the given mass of CuSO4.5H2O, and molar mass is the value we just calculated.

Substituting the values, we get:

number of moles = 50 g / 249.67 g/mol

= 0.2002 mol (rounded to four significant figures)

Therefore, 50g of copper (II) sulfate crystals contain 0.2002 moles of CuSO4.5H2O

User Dwanderson
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