Now, we can calculate the molar mass of ethanol (C2H6O): Molar mass of ethanol = (2 * molar mass of carbon) + (6 * molar mass of hydrogen) + (1 * molar mass of oxygen) Molar mass of ethanol = (2 * 12.01 g/mol) + (6 * 1.01 g/mol) + (1 * 16.00 g/mol) Molar mass of ethanol = 24.02 g/mol + 6.06 g/mol + 16.00 g/mol Molar mass of ethanol = 46.08 g/mol
Now, we can calculate the mass of each element in 25 grams of ethanol: Mass of carbon = (2 * molar mass of carbon) / molar mass of ethanol * 25 g Mass of carbon = (2 * 12.01 g/mol) / 46.08 g/mol * 25 g Mass of carbon = 24.02 g / 46.08 g * 25 g Mass of carbon = 12.99 g
Mass of hydrogen = (6 * molar mass of hydrogen) / molar mass of ethanol * 25 g Mass of hydrogen = (6 * 1.01 g/mol) / 46.08 g/mol * 25 g Mass of hydrogen = 6.06 g / 46.08 g * 25 g Mass of hydrogen = 3.28 g
Mass of oxygen = (1 * molar mass of oxygen) / molar mass of ethanol * 25 g Mass of oxygen = (1 * 16.00 g/mol) / 46.08 g/mol * 25 g Mass of oxygen = 16.00 g / 46.08 g * 25 g Mass of oxygen = 8.73 g
Now, we can calculate the ratio of carbon to hydrogen to oxygen by mass: Ratio of carbon to hydrogen to oxygen = 12.99 g : 3.28 g : 8.73 g Ratio of carbon to hydrogen to oxygen = 3.96 : 1 : 2.66
Therefore, the ratio of carbon to hydrogen to oxygen by mass in 25 grams of ethanol is approximately 3.96 : 1 : 2.66.
1
Google Gemini AI
more than 4 weeks ago
Calculations:
1. Calculate the molar mass of ethanol (C2H6O): ``` Molar mass = 2 x atomic mass of C + 6 x atomic mass of H + 1 x atomic mass of O Molar mass = 2 x 12 g/mol + 6 x 1 g/mol + 1 x 16 g/mol Molar mass = 46 g/mol ```
2. Convert the given mass of ethanol (25 g) to moles: ``` Moles of ethanol = Mass / Molar mass Moles of ethanol = 25 g / 46 g/mol Moles of ethanol = 0.5435 mol ```
3. Determine the mass of each element in 0.5435 mol of ethanol: ``` Mass of carbon (2C) = Moles of ethanol x Molar mass of carbon atoms Mass of carbon = 0.5435 mol x 2 x 12 g/mol Mass of carbon = 13.0 g
Mass of hydrogen (6H) = Moles of ethanol x Molar mass of hydrogen atoms Mass of hydrogen = 0.5435 mol x 6 x 1 g/mol Mass of hydrogen = 3.26 g
Mass of oxygen (O) = Moles of ethanol x Molar mass of oxygen atom Mass of oxygen = 0.5435 mol x 1 x 16 g/mol Mass of oxygen = 8.7 g ```
4. Calculate the ratio of carbon to hydrogen to oxygen by mass: ``` Ratio of carbon to hydrogen to oxygen = Mass of carbon : Mass of hydrogen : Mass of oxygen Ratio = 13.0 g : 3.26 g : 8.7 g ```
Therefore, the ratio of carbon to hydrogen to oxygen by mass in 25 grams of ethanol is approximately 13 : 3.3 : 8.7.