how many grams of chlorine are in 65 grams of CF2Cl2?
The ratio of chlorine mass to total mass is
(2*35.5)/[12 + 2*19 + 2*35.5)
= 71/121
Multiply that by 65g
To determine the number of grams of chlorine in CF2Cl2, we need to consider the molecular formula and the molar masses of the elements.
The molecular formula CF2Cl2 indicates that there are two atoms of chlorine (Cl) in one molecule of CF2Cl2. To calculate the molar mass of CF2Cl2, we add up the atomic masses of the elements: carbon (C), fluorine (F), and chlorine (Cl).
The atomic mass of carbon is 12.01 g/mol, the atomic mass of fluorine is 19.00 g/mol, and the atomic mass of chlorine is 35.45 g/mol.
So, the molar mass of CF2Cl2 can be calculated as follows:
Molar mass = (2 × 35.45 g/mol) + (2 × 19.00 g/mol) + (1 × 12.01 g/mol)
Molar mass = 70.90 g/mol + 38.00 g/mol + 12.01 g/mol
Molar mass = 120.91 g/mol
Now, we can use the molar mass of CF2Cl2 to determine how many moles are present in 65 grams:
Moles of CF2Cl2 = mass / molar mass
Moles of CF2Cl2 = 65 g / 120.91 g/mol
Moles of CF2Cl2 ≈ 0.537 mol (rounded to three decimal places)
Since there are two atoms of chlorine in one molecule of CF2Cl2, the number of moles of chlorine is double the moles of CF2Cl2:
Moles of chlorine = 2 × moles of CF2Cl2
Moles of chlorine = 2 × 0.537 mol
Moles of chlorine ≈ 1.074 mol (rounded to three decimal places)
Finally, to calculate the grams of chlorine, we can use the molar mass of chlorine:
Mass of chlorine = moles of chlorine × molar mass of chlorine
Mass of chlorine = 1.074 mol × 35.45 g/mol
Mass of chlorine ≈ 38.05 grams (rounded to two decimal places)
Therefore, there are approximately 38.05 grams of chlorine in 65 grams of CF2Cl2.