Mole Concept
How many moles of carbon dioxide are produced when 44 g of carbon dioxide is taken at standard conditions?
Select the correct option:
Solution
1.0 mol
The mole concept establishes that one mole of any substance contains Avogadro's number ((6.022 \times 10^{23})) of particles and has a mass equal to the molar mass in grams. Carbon dioxide ((\text{CO}_2)) has a molar mass of (12 + 2 \times 16 = 44 \text{ g mol}^{-1}). Therefore, 44 g of (\text{CO}_2) corresponds to (44/44 = 1.0) mol. Option 0.5 mol is incorrect because it would correspond to only 22 g of (\text{CO}_2), not 44 g. Option 2.0 mol is wrong because that would require 88 g of (\text{CO}_2). Option 4.0 mol is also incorrect as it would require 176 g. This calculation directly applies the NCERT definition of molar mass: the mass in grams of one mole of a substance numerically equals its molecular mass in atomic mass units. Plausibility check: 44 g divided by 44 g/mol gives exactly 1.0 mol, confirming the answer is dimensionally consistent and numerically correct.
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About This Question
- Subject
- chemistry
- Chapter
- some basic concepts in chemistry
- Topic
- mole concept
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
1.0 mol
The mole concept establishes that one mole of any substance contains Avogadro's number ((6.022 \times 10^{23})) of particles and has a mass equal to the molar mass in grams. Carbon dioxide ((\text{CO}_2)) has a molar mass of (12 + 2 \times 16 = 44 \text{ g mol}^{-1}). Therefore, 44 g of (\text{CO}_2) corresponds to (44/44 = 1.0) mol. Option 0.5 mol is incorrect because it would correspond to only 22 g of (\text{CO}_2), not 44 g. Option 2.0 mol is wrong because that would require 88 g of (\text{CO}_2). Option 4.0 mol is also incorrect as it would require 176 g. This calculation directly applies the NCERT definition of molar mass: the mass in grams of one mole of a substance numerically equals its molecular mass in atomic mass units. Plausibility check: 44 g divided by 44 g/mol gives exactly 1.0 mol, confirming the answer is dimensionally consistent and numerically correct.
This easy difficulty chemistry question is from the chapter some basic concepts in chemistry, covering the topic of mole concept. It appeared in the 2025 exam.
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