The number of oxygen atoms in 4.4g of carbon dioxide is approximately?
Correct answer: A. 1.2 x 10^23
- A. 1.2 x 10^23
- B. 6 x 10^22
- C. 6 x 10^23
- D. 2 x 10^23
Explanation
Correct Option: a. 1.2 x 10^23Here's how we can calculate the number of oxygen atoms in 4.4g of carbon dioxide:1. Calculate the number of moles of CO2:Molar mass of CO2 = 44.01 g/molNumber of moles (n) = mass (m) / molar massn = 4.4 g / 44.01 g/mol ≈ 0.1 mol2. Determine the number of oxygen atoms per molecule of CO2:Each CO2 molecule has 2 oxygen atoms.3. Calculate the total number of oxygen atoms:Number of oxygen atoms = n (moles of CO2) * atoms per molecule * Avogadro's constant (N_A)N_A ≈ 6.022 x 10^23 atoms/molNumber of oxygen atoms ≈ 0.1 mol * 2 atoms/molecule * 6.022 x 10^23 atoms/mol ≈ 1.204 x 10^23 atomsTherefore, there are approximately 1.2 x 10^23 oxygen atoms in 4.4g of carbon dioxide.
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Mole calculations connect mass, number of particles and Avogadro's number, while balanced equations provide the mole ratios used in stoichiometry. Questions cover limiting and excess reactants, theoretical yield and percentage yield, including identifying which reactant is consumed first and comparing the actual product with the maximum possible product.
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