Answer:
250 mL
Step-by-step explanation:
We must assume the volume ratio is the same as the mass ratio. If x represents the volume of solution, we want ...
0.15 mL/x = 600/10^6
x = (0.15·10^6)/600 mL = 250 mL
250 mL of the solution will contain 0.15 g of sucrose.
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Additional comment
Often the distinction between mL and grams is blurred when describing dilute solutions. That is, mass per volume ratios are given in percent or ppm or ppb as though the units in the ratio cancel.