Question

In lab you need to measure out 0.15 mol of C8H16O8C8H16O8 for an experiment. How many grams should you weigh out? Give your answer to 2 decimal spaces.

Answer 1

ANSWER;

The molar mass of C8H16O8C8H16O8 is (8 X 12.0) + (16 X 1.008) + (8 X 15.99) + (8 X 12.0) + (16 X 1.008) + (8 X 15.99) = 480.096g

0.15 moles can be calculated by the followin simple folrmula

Number of moles = Mass / Molar mass

Mass = Number of moles X Molar mass

Mass = ?

Number of moles = 0.15

Molar mass = 480.096g

Mass = 0.15 X 480.096 = 72.04g

Hence we should weigh 72.04g.

NOTE: The molecule is repition of two units C8H16O8, this may be a typo mistake. So if the molecule is C8H16O8 then the molar mass is 240.048. In that case substitute 240.048g instad of 480.096g