Calculate the number of moles in 3.20 g of each of the following:
CS2
Express your answer in moles
To calculate the number of moles in CS2, we need to use its molar mass. The molar mass of CS2 can be calculated by adding the atomic masses of carbon and sulfur:
Carbon (C) atomic mass = 12.01 g/mol
Sulfur (S) atomic mass = 32.07 g/mol
Molar mass of CS2 = (12.01 g/mol) + 2(32.07 g/mol) = 76.15 g/mol
Now we can calculate the number of moles by dividing the given mass by the molar mass:
Number of moles = (mass of CS2)/(molar mass of CS2)
Number of moles = (3.20 g)/(76.15 g/mol) ≈ 0.042 moles
Therefore, there are approximately 0.042 moles of CS2 in 3.20 g.
To calculate the number of moles in a substance, you need to use its molar mass.
1. Find the molar mass of CS2 by adding the atomic masses of each element:
- Carbon (C) has a molar mass of 12.01 g/mol
- Sulfur (S) has a molar mass of 32.07 g/mol
- Multiply the atomic mass of sulfur by 2, as there are two sulfur atoms in CS2.
- Add the molar masses together:
Molar Mass of CS2 = (12.01 g/mol) + (32.07 g/mol * 2) = 76.15 g/mol
2. Use the equation:
Number of Moles = Mass / Molar Mass
Number of Moles of CS2 = 3.20 g / 76.15 g/mol
Number of Moles of CS2 ≈ 0.042 moles (rounded to three decimal places)
So, there are approximately 0.042 moles of CS2 in 3.20 g.
To calculate the number of moles in a given substance, you can use the formula:
moles = mass / molar mass
First, let's determine the molar mass of CS2 (carbon disulfide). To do this, we need to know the atomic masses of carbon (C) and sulfur (S).
The atomic mass of carbon (C) is approximately 12.01 g/mol, and the atomic mass of sulfur (S) is approximately 32.07 g/mol.
To find the molar mass of CS2, we multiply the atomic mass of carbon by 1 and the atomic mass of sulfur by 2 (since there are two sulfur atoms in CS2) and sum the results:
Molar mass of CS2 = (12.01 g/mol) + 2 * (32.07 g/mol)
= 76.15 g/mol
Now that we have the molar mass of CS2, we can calculate the number of moles using the given mass of 3.20 g:
moles = mass / molar mass
= 3.20 g / 76.15 g/mol
≈ 0.042 moles
Therefore, the number of moles in 3.20 g of CS2 is approximately 0.042 moles.