How many moles of carbon, hydrogen, and oxygen are present in a 100g sample of ascorbic acid?
To determine the number of moles of carbon, hydrogen, and oxygen in a sample of ascorbic acid, we need to know the molecular formula of ascorbic acid, which is C6H8O6. This formula tells us that there are 6 carbon atoms (C6), 8 hydrogen atoms (H8), and 6 oxygen atoms (O6) in each molecule of ascorbic acid.
To calculate the number of moles, we need to use the molar mass of each element. The molar mass of carbon is 12.01 g/mol, hydrogen is 1.01 g/mol, and oxygen is 16.00 g/mol.
First, let's calculate the number of moles of carbon:
Molar mass of carbon = 12.01 g/mol
Mass of carbon in the sample = 100g
Number of moles of carbon = Mass of carbon / Molar mass of carbon
= 100g / 12.01 g/mol
Next, let's calculate the number of moles of hydrogen:
Molar mass of hydrogen = 1.01 g/mol
Mass of hydrogen in the sample = 100g
Number of moles of hydrogen = Mass of hydrogen / Molar mass of hydrogen
= 100g / 1.01 g/mol
Lastly, let's calculate the number of moles of oxygen:
Molar mass of oxygen = 16.00 g/mol
Mass of oxygen in the sample = 100g
Number of moles of oxygen = Mass of oxygen / Molar mass of oxygen
= 100g / 16.00 g/mol
Now that we have the number of moles for each element, we can use these values to answer the question.
well, assuming you can find the formula for ascorbic acid, say CaObHc, then you can figure the mole weight of acid (12a+16b+c), and divide that into 100g.
Then multiply that number of moles by the respective proportions of the various elements.