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A: Cl = 35; 35*2 = 70g
40+70 = 110G CaCl2
250gCaCl2 * (1 mol CaCl2) / (110gCaCl2) = 2.27 mol CaCl2
V = 1500mL ---> 1500mL * (1Litro) / (1000ml) = 1.5L
M = n/v -----> M= 2.27molesCaCl2 / 1.5L ----> 1.5Moles/Litro ---> 1.5M