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What is the mass of carbon dioxide which contains the same number of molecules as are contained in 40 g of oxygen?
  • a)
    40g
  • b)
    55g
  • c)
    32g
  • d)
    44g
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
What is the mass of carbon dioxide which contains the same number of m...
Molar mass of O2 = 32 g mol-1
32 g of O2 = 6.023 x 1023 molecules
40 g of O2 =  = 7.529 x 1023 molecules
Mass of 6.023 x 1023 molecules of CO2 = 44 g
Mass of 7.529 x 1023 molecules of CO2
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Most Upvoted Answer
What is the mass of carbon dioxide which contains the same number of m...
Given:
Mass of oxygen = 40 g
To find:
Mass of carbon dioxide containing the same number of molecules as in 40 g of oxygen

Solution:
To solve this problem, we need to use the concept of molar mass and Avogadro's number.

Step 1: Find the number of molecules in 40 g of oxygen.
The molar mass of oxygen (O₂) is 32 g/mol.
Number of moles of O₂ = Mass / Molar mass = 40 / 32 = 1.25 mol
Number of molecules of O₂ = Number of moles * Avogadro's number
= 1.25 mol * 6.022 x 10²³/mol
= 7.53 x 10²³ molecules

Step 2: Find the mass of carbon dioxide containing the same number of molecules as in 40 g of oxygen.
The molar mass of carbon dioxide (CO₂) is 44 g/mol.
Number of moles of CO₂ = Number of molecules / Avogadro's number
= 7.53 x 10²³ molecules / 6.022 x 10²³/mol
= 1.25 mol
Mass of CO₂ = Number of moles * Molar mass
= 1.25 mol * 44 g/mol
= 55 g

Therefore, the mass of carbon dioxide containing the same number of molecules as in 40 g of oxygen is 55 g.

Answer: (b) 55 g
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What is the mass of carbon dioxide which contains the same number of molecules as are contained in 40 g of oxygen?a)40gb)55gc)32gd)44gCorrect answer is option 'B'. Can you explain this answer?
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