All. It depends on the lab setup, equipment, and expertise.
222.5 g
I did it like this:
X/250= 89/100=
22250/100=
222.5
mol CaCl₂ = 1.2 x 10²⁴ : 6.02 x 10²³ = 1.993
mass = 1.993 x 111 g/mol = 221.223 g
According to periodic trends, bismuth has the greatest atomic radius.
