1 mole of CH4 contains
Correct answer: A. 1 mole of CH4 contains
- A. 1 mole of CH4 contains
- B. 4 g-atom of hydrogen
- C. 1.81 x 10^23 molecules of CH4
- D. 3.0 g of carbon
Explanation
Correct Option: a. 6.02 x 10^23 atoms of HOne mole of CH4 contains 6.02 x 10^23 atoms of H because:Avogadro's constant: This constant, denoted by N_A, represents the number of particles (atoms, molecules, ions) in one mole of a substance. Its value is approximately 6.022 x 10^23 per mole.Chemical formula of CH4: CH4 stands for methane, which has one carbon atom (C) and four hydrogen atoms (H).Meaning of "1 mole": When we say "1 mole of CH4," we mean that there are N_A (6.02 x 10^23) CH4 molecules present.Therefore, combining the points above, 1 mole of CH4 contains N_A * 4 H atoms = 6.02 x 10^23 H atoms.
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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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