How many mole are there in 30g of calcium chloride calc calc=111?
30 g * 1mole/111g = 30/111 mole
To calculate the number of moles in a given mass of a substance, you need to use the formula:
moles = mass / molar mass
In this case, the molar mass of calcium chloride (CaCl2) is 111 g/mol, as you mentioned.
So, to find the number of moles in 30g of calcium chloride, divide the mass by the molar mass:
moles = 30g / 111 g/mol
moles ≈ 0.270 moles (rounded to three decimal places)
Therefore, there are approximately 0.270 moles in 30g of calcium chloride.
To calculate the number of moles in 30g of calcium chloride (CaCl2), we need to use the molar mass of calcium chloride.
The molar mass of calcium chloride (CaCl2) can be calculated by adding up the atomic masses of its constituent elements. The atomic mass of calcium (Ca) is approximately 40.08 g/mol, and the atomic mass of chlorine (Cl) is approximately 35.45 g/mol. Since there are two chlorine atoms in calcium chloride, we multiply the atomic mass of chlorine by 2.
Molar mass of CaCl2 = (atomic mass of calcium) + 2 * (atomic mass of chlorine)
= 40.08 g/mol + 2 * 35.45 g/mol
= 40.08 g/mol + 70.9 g/mol
= 110.98 g/mol (rounded to 111 g/mol)
Now, we can use the molar mass to calculate the number of moles:
Number of moles = mass of substance / molar mass
= 30g / 111g/mol
≈ 0.27 moles
Therefore, there are approximately 0.27 moles in 30g of calcium chloride (CaCl2).