How many grams are present in a 2.7 mol sample of CO_2?

• A. 119 g
• B. 44 g
• C. 118.8 g
• D. 60.2 g

Answer: (C)

Verified step by step guidance

1. Identify the molar mass of carbon dioxide (CO\_2). To do this, sum the atomic masses of one carbon atom and two oxygen atoms. Use the periodic table values: carbon (C) has an atomic mass of approximately 12.01 g/mol, and oxygen (O) has an atomic mass of approximately 16.00 g/mol.
2. Calculate the molar mass of CO\_2 using the formula: \(\text{Molar mass of CO\_2} = 12.01 + 2 \times 16.00\) g/mol.
3. Use the relationship between moles, molar mass, and mass: \(\text{mass} = \text{moles} \times \text{molar mass}\). Here, the number of moles is given as 2.7 mol.
4. Substitute the values into the formula: \(\text{mass} = 2.7 \text{ mol} \times \text{molar mass of CO\_2}\) (from step 2).
5. Perform the multiplication to find the mass in grams, which will give you the number of grams present in the 2.7 mol sample of CO\_2.