Question

how many moles of sucrose are in 5.25x10^29 sucrose molecules?

Answer 1

6.022e23 molecules/mole Avogadro constant 

that's all you need 
5.25e29 molecules / (6.022e23 molecules/mole) = 0.872e6 moles = 872000 moles

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Answer 2

The answer is 8.72×10^5