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How many molecules are in 1.00 mg of glucose, #C_6H_12O_6#?

Answer 1

Luna Chen

The molar mass of glucose is #(6xx12.011+12xx1.0794+6xx15.99)*g*mol^(-1)#. You have a milligram mass.

So, in 1 mol there are Avogadro's number of molecules, i.e. #6.022xx10^(23) mol^-1# #=# #N_A#.

Now for our computation:

#(1.00xx10^(-3)cancel(g)xxN_A*"molecules"*cancel(mol^-1))/((6xx12.011+12xx1.0794+6xx15.99)*cancel(g*mol^(-1))# #=#

#?? # glucose molecules.

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Answer 2

Henry Antrim

The number of molecules in 1.00 mg of glucose (C₆H₁₂O₆) is approximately (1.12 \times 10^{16}) molecules.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.