55g of CF2Cl2, how many grams of Cl do I have? How do I solve this kind of problem?
%Cl in CF2Cl2 = [(2*35.5)/molar mass CF2Cl2]*100 = ??
Now you have 55 g and Cl is ??% of that. How many grams do you have?
To solve this problem, you'll need to determine the molar mass of CF2Cl2 and then calculate the grams of chlorine (Cl) in 55g of CF2Cl2.
Step 1: Determine the molar mass of CF2Cl2
The molar mass is the sum of the atomic masses of all elements in the compound. CF2Cl2 consists of carbon (C), fluorine (F), and chlorine (Cl). To calculate the molar mass, you'll need to look up the atomic masses of these elements. The atomic mass of C is 12.01 g/mol, F is 18.99 g/mol, and Cl is 35.45 g/mol.
Molar mass of CF2Cl2:
(1 * C) + (2 * F) + (2 * Cl)
= (1 * 12.01 g/mol) + (2 * 18.99 g/mol) + (2 * 35.45 g/mol)
= 86.97 g/mol
Step 2: Calculate the grams of chlorine (Cl) in 55g of CF2Cl2.
To determine the grams of Cl in 55g of CF2Cl2, we'll use the molar mass ratio between Cl and CF2Cl2.
Mass of Cl = (Number of moles of Cl) * (Molar mass of Cl)
Number of moles of Cl = (Number of moles of CF2Cl2) * (Number of Cl atoms per CF2Cl2 molecule)
Number of moles of CF2Cl2 = Mass of CF2Cl2 / Molar mass of CF2Cl2
Number of moles of Cl = (Mass of CF2Cl2 / Molar mass of CF2Cl2) * (Number of Cl atoms per CF2Cl2 molecule)
To find the ratio of Cl atoms to CF2Cl2 molecules, we look at the formula: CF2Cl2. There are 2 Cl atoms per CF2Cl2 molecule.
Number of Cl atoms per CF2Cl2 molecule = 2
Now we can calculate the grams of Cl in 55g of CF2Cl2:
Number of moles of CF2Cl2 = 55g / 86.97 g/mol
Number of moles of Cl = (55g / 86.97 g/mol) * 2
Finally, calculate the mass of Cl:
Mass of Cl = Number of moles of Cl * Molar mass of Cl
Molar mass of Cl = 35.45 g/mol
Mass of Cl = (Number of moles of Cl) * (Molar mass of Cl)
To determine the amount of chlorine (Cl) in 55g of CF2Cl2, you need to know the molar mass of CF2Cl2 and the ratio of chlorine atoms to CF2Cl2 molecules.
Here's how you can solve this problem:
1. Find the molar mass of CF2Cl2:
- The molar mass of carbon (C) is approximately 12.01 g/mol.
- The molar mass of fluorine (F) is approximately 18.99 g/mol.
- The molar mass of chlorine (Cl) is approximately 35.45 g/mol.
- Since CF2Cl2 has one carbon atom, two fluorine atoms, and two chlorine atoms, its molar mass is:
Molar mass of CF2Cl2 = (1 × 12.01 g/mol) + (2 × 18.99 g/mol) + (2 × 35.45 g/mol) = 120.92 g/mol.
2. Determine the fraction of chlorine in CF2Cl2:
- CF2Cl2 contains two chlorine atoms.
- Divide the molar mass of chlorine by the molar mass of CF2Cl2 to find the fraction of chlorine:
Fraction of chlorine = (2 × 35.45 g/mol) / 120.92 g/mol ≈ 0.582
3. Calculate the grams of chlorine in 55g of CF2Cl2:
- Multiply the mass of CF2Cl2 (55g) by the fraction of chlorine:
Grams of chlorine = 55g × 0.582 ≈ 32.01g.
Therefore, you have approximately 32.01 grams of chlorine in 55 grams of CF2Cl2.