How many moles of aspirin C9H8O4, are in a bottle comtaining 450g by weight? (The approx atomic weights are C=12, H=1, O=16)
2.5 MOLES
A/ 1 MOLE = 180 gm
x MOLE= 450 gm
X=450/180=2.5 MOLES
molar mass approx 9*12 + 8*1 + 4*16 = 108 +8 + 64 = about 180
mols = grams/molar mass = ?
To calculate the number of moles of aspirin (C9H8O4) in a bottle containing 450g, you need to follow these steps:
Step 1: Determine the molar mass of aspirin (C9H8O4).
The molar mass of each element in the molecular formula is as follows:
- Carbon (C): 12 g/mol
- Hydrogen (H): 1 g/mol
- Oxygen (O): 16 g/mol
To compute the molar mass of aspirin, sum up the molar masses of each element:
Molar mass of aspirin (C9H8O4):
(9 × molar mass of carbon) + (8 × molar mass of hydrogen) + (4 × molar mass of oxygen)
= (9 × 12 g/mol) + (8 × 1 g/mol) + (4 × 16 g/mol)
= 108 g/mol + 8 g/mol + 64 g/mol
= 180 g/mol
Step 2: Determine the number of moles.
To calculate the number of moles, use the formula:
Moles = Mass / Molar Mass
Moles of aspirin = Mass of aspirin / Molar mass of aspirin
Moles of aspirin = 450 g / 180 g/mol
Calculating this equation:
Moles of aspirin = 2.5 moles
Therefore, there are approximately 2.5 moles of aspirin in a bottle containing 450g by weight.
To determine the number of moles of aspirin (C9H8O4) in a bottle weighing 450g, we need to follow a few steps:
Step 1: Calculate the molar mass of aspirin (C9H8O4).
To find the molar mass, we multiply the atomic masses of each element by the number of atoms present in the molecular formula:
Molar mass of C9H8O4 = (9 * atomic mass of C) + (8 * atomic mass of H) + (4 * atomic mass of O)
Molar mass of C9H8O4 = (9 * 12.01 g/mol) + (8 * 1.01 g/mol) + (4 * 16.00 g/mol)
Molar mass of C9H8O4 = 180.16 g/mol
Step 2: Convert the weight of the bottle from grams to moles.
We can use the formula:
moles = mass / molar mass
moles = 450g / 180.16 g/mol
moles ≈ 2.498 moles (rounded to three decimal places)
Therefore, there are approximately 2.498 moles of aspirin (C9H8O4) in the bottle weighing 450g.