Final answer:
The mass of carbon in 1200 grams of Freon-12 would be 120 grams, which is 1/10 of the total mass. However, this answer is not represented in the provided choices, indicating an error in the question or the available choices.
Step-by-step explanation:
The question asks for the weight of the carbon element in 1200 grams of Freon-12, which has the chemical formula CCl2F2. To find this, we need to calculate the molar mass of Freon-12 and determine the mass proportion of carbon in one mole of the substance.
The molar mass of Freon-12 is calculated as follows:
Molar mass of C = 12 g/mol (given)
Molar mass of Cl = 35 g/mol (given, note there's a typo in the question, it should be Cl, not C1)
Molar mass of F = 19 g/mol (given)
The molar mass of Freon-12 (CCl2F2) = 12 g/mol (C) + 2 * 35 g/mol (Cl) + 2 * 19 g/mol (F) = 12 + 70 + 38 = 120 g/mol.
The proportion of carbon's mass in Freon-12 is (12 g)/(120 g/mol), which is 1/10. Therefore, the mass of carbon in 1200 grams of Freon-12 is 1200 g * (1/10) = 120 grams. However, this option isn't available in the provided choices, which indicates there may be an error in the question or the available choices. According to the choices given, none of them correctly represent the mass of carbon in 1200 grams of Freon-12 based on the molar mass calculated.