Answer:
305.8mL
Explanation: l believe first we get the moles of CaCl2 by dividing the given mass to the molar mass. We than find the volume by manipulating (make v the subject of the formula) the formula c= n÷v.
n(CaCl2)= m/M=(18.67g)÷(110.98g/mol)
=0.16822mol
c=n/v
v= n/c = (0.16822mol)÷ (.55M) = 0.3058L = 305.305.8ml
