Respuesta :
Answer:
To find the amount of carbon (C) present in 7.54 g of CO₂, we need to first calculate the amount of CO₂ produced and then determine the corresponding amount of carbon.
1. Calculate the molar mass of CO₂:
C = 12.01 g/mol
O = 16.00 g/mol (there are two oxygen atoms)
Molar mass of CO₂ = 12.01 + 2(16.00) = 44.01 g/mol
2. Determine the number of moles of CO₂ produced:
Moles of CO₂ = Mass of CO₂ / Molar mass of CO₂
Moles of CO₂ = 7.54 g / 44.01 g/mol ≈ 0.1712 moles
3. Since one mole of CO₂ contains one mole of carbon, the amount of carbon present in 7.54 g of CO₂ is:
Mass of C = Moles of CO₂ ≈ 0.1712 moles
Therefore, approximately 0.1712 moles of carbon are present in 7.54 g of CO₂.
To find the amount of hydrogen (H) present in 2.06 g of H₂O, we follow a similar approach:
1. Calculate the molar mass of H₂O:
H = 1.01 g/mol (there are two hydrogen atoms)
O = 16.00 g/mol
Molar mass of H₂O = 2(1.01) + 16.00 = 18.02 g/mol
2. Determine the number of moles of H₂O produced:
Moles of H₂O = Mass of H₂O / Molar mass of H₂O
Moles of H₂O = 2.06 g / 18.02 g/mol ≈ 0.1143 moles
3. Since one mole of H₂O contains two moles of hydrogen, the amount of hydrogen present in 2.06 g of H₂O is:
Mass of H = 2 x Moles of H₂O ≈ 2 x 0.1143 ≈ 0.2286 moles
Therefore, approximately 0.2286 moles of hydrogen are present in 2.06 g of H₂O.
Explanation:
