Use the table of molar masses to complete the question. Do NOT use any other values except the ones provided in the table below.
Element Molar Mass (g/mol)
carbon 12.01
hydrogen 1.01
oxygen 16.00
A chemist will use a sample of 30g of glucose ( C6H12O6
) in an experiment. Determine the number of moles of glucose the chemist will use based on the molar mass values provided in the table. (Your value should be rounded to 2 decimal places; i.e. the hundredths place).
(2 points)
The number of moles the chemist will use is:
moles.
To determine the number of moles of glucose in a 30g sample, we need to first calculate the molar mass of glucose (C6H12O6).
Molar mass of glucose:
6 mol of carbon (6 x 12.01 g/mol) = 72.06 g
12 mol of hydrogen (12 x 1.01 g/mol) = 12.12 g
6 mol of oxygen (6 x 16.00 g/mol) = 96.00 g
Total molar mass of glucose = 72.06 g + 12.12 g + 96.00 g = 180.18 g/mol
Now, we can calculate the number of moles in a 30g sample of glucose:
Number of moles = mass of sample / molar mass
Number of moles = 30g / 180.18 g/mol
Number of moles ≈ 0.17 moles
Therefore, the chemist will use approximately 0.17 moles of glucose in the experiment.