8.58 grams of CaCl2 is dissolved in H2O. How many moles of CaCl2 dissolved?

Answer 1

To find the number of moles of CaCl2 dissolved, we can use the formula:

moles = mass / molar mass

where mass is the mass of CaCl2 dissolved and molar mass is the molar mass of CaCl2.

The molar mass of CaCl2 can be calculated as follows:

Ca: atomic weight = 40.08 g/mol Cl: atomic weight = 35.45 g/mol (there are two Cl atoms in CaCl2, so we need to multiply this by 2)

Molar mass of CaCl2 = 40.08 + (2 x 35.45) = 110.98 g/mol

Now we can calculate the number of moles of CaCl2 dissolved:

moles = mass / molar mass = 8.58 g / 110.98 g/mol = 0.0773 mol



Therefore, 8.58 grams of CaCl2 dissolved in water represents 0.0773 moles of CaCl2.