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Chlorine is in Group 7 of the Periodic Table - OCR Gateway - GCSE Chemistry: Combined Science - Question 10 - 2019 - Paper 10

Question 10

Chlorine is in Group 7 of the Periodic Table. What is the mass of 2 moles of chlorine gas? A 35.5g B 71.0g C 106.5g D 142.0g Your answer

Worked Solution & Example Answer:Chlorine is in Group 7 of the Periodic Table - OCR Gateway - GCSE Chemistry: Combined Science - Question 10 - 2019 - Paper 10

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Answer

To find the mass of 2 moles of chlorine gas, we first need to know the molar mass of chlorine (Cl).

Chlorine has a molar mass of approximately 35.5 g/mol. Therefore, the mass of 2 moles of chlorine gas can be calculated using the formula:

ext{Mass} = ext{Number of Moles} imes ext{Molar Mass}

Substituting the values:

ext{Mass} = 2 ext{ moles} imes 35.5 ext{ g/mol} = 71.0 ext{ g}

Thus, the mass of 2 moles of chlorine gas is 71.0 g. Therefore, the correct answer is B.

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