use dilution formula
M1*V1 = M2*V2
1---> is for stock solution
2---> is for diluted solution
Given:
M1 = 18.7 M
V1 = 17.7 mL
V2 = 307.82 mL
use:
M1*V1 = M2*V2
M2 = (M1*V1)/V2
M2 = (18.7*17.7)/307.82
M2 = 1.0753 M
Answer: 1.08 M
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