Final answer:
To calculate the number of grams of CaCl2 in 250 mL of a 2.0 M solution, multiply the number of moles of CaCl2 by its molar mass.
Step-by-step explanation:
To calculate the number of grams of CaCl2 in 250 mL of a 2.0 M solution, we need to use the formula:
grams = moles × molar mass
First, we need to convert the given volume in milliliters to liters:
250 mL = 0.250 L
Next, we can calculate the number of moles of CaCl2:
moles = volume (L) × concentration (M)
moles = 0.250 L × 2.0 M = 0.500 moles
Finally, we can use the molar mass of CaCl2 to calculate the grams:
grams = 0.500 moles × 110.98 g/mol = 55.49 grams
Therefore, there are 55.49 grams of CaCl2 in 250 mL of a 2.0 M solution.