A chemist used 500g of glucose(c6H12o6)in a preparation of a drug in the laboratory how many moles was used?
mols = grams/molar mass
To find the number of moles in a given mass of a substance, we need to use the formula:
Number of moles (n) = Mass (m) / Molar mass (M)
In this case, you want to find the number of moles of glucose (C6H12O6) that were used. The molar mass of glucose can be calculated by adding up the molar masses of each element present in the molecule.
The molar mass of carbon (C) = 12.01 g/mol
The molar mass of hydrogen (H) = 1.01 g/mol
The molar mass of oxygen (O) = 16.00 g/mol
Now, let's calculate the molar mass of glucose:
(6 atoms of carbon * 12.01 g/mol) + (12 atoms of hydrogen * 1.01 g/mol) + (6 atoms of oxygen * 16.00 g/mol)
= (72.06 g/mol) + (12.12 g/mol) + (96.00 g/mol)
= 180.18 g/mol
Now that we have the molar mass of glucose, we can substitute it into the formula to find the number of moles:
n = 500 g / 180.18 g/mol
By dividing the mass of glucose (500 g) by its molar mass (180.18 g/mol), we get:
n ≈ 2.775 moles (rounded to three decimal places)
Therefore, the chemist used approximately 2.775 moles of glucose in the preparation of the drug.