It looks like you're asking for help with a problem related to chemistry, but the notation you've provided is somewhat unclear. However, it appears that you're working with molecular formulas and perhaps looking for the calculations or characteristics of certain chemical species.
To provide meaningful assistance, I'll assume:
- \( C \) represents carbon.
- \( C_2 \) represents a diatomic molecule of carbon, which is not common, but could be referencing a C-C bond or dimer (like \( C_2 \) in certain contexts).
- \( D \) and \( D_2 \) could represent a diatomic molecule of deuterium, or perhaps another element or compound.
To help you further, I will clarify the variables and provide general information on how to interpret and find the properties of diatomic molecules based on known data about carbon and deuterium.
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Identifying Variables:
- C: Could represent the molar mass of carbon.
- C_(2): Could be referring to the structure of a carbon molecule involving bonding.
- D: If D refers to deuterium (an isotope of hydrogen), its molar mass is approximately 2 grams per mole.
- D_(2): This represents a diatomic molecule of deuterium.
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Finding the values:
- The atomic mass of carbon (C) is approximately \( 12 , g/mol \).
- For diatomic carbon (\( C_2 \)): It would be \( 2 \times 12 , g/mol = 24 , g/mol \).
- For deuterium (D): The molar mass is approximately \( 2 , g/mol \).
- For diatomic deuterium (\( D_2 \)): It would be \( 2 \times 2 , g/mol = 4 , g/mol \).
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Final Answers:
- C (molar mass of carbon): \( \boxed{12 , g/mol} \)
- C_(2) (molar mass of diatomic carbon): \( \boxed{24 , g/mol} \)
- D (molar mass of deuterium): \( \boxed{2 , g/mol} \)
- D_(2) (molar mass of diatomic deuterium): \( \boxed{4 , g/mol} \)
If you have a specific type of problem or additional context you need help with, please provide more details, and I’d be glad to assist!