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A hydro carbon contains 85.7 percent …

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A hydro carbon contains 85.7 percent carbon if 42 mili g of compound contains 3.01×10²⁰ molecules what is the molecular formula
  • 1 answers

Sia ? 2 years, 9 months ago

First, assume the hydrocarbon is CxHy. Find the Mr, so that we can find the value of x. With Mr and x, we can find the value of y. So the molecular formula of the hydricarbon compund is C6H12.
Remember some formulas:
n = m/Mr
molecules = n x 6.02 x 1023
Mr = molecular mass
Ar = atomic mass. Ar C = 12, Ar H = 1

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