The number of carbon atoms in 6mg of a graphite piece is:
Correct answer: C. 3.01 x 10^20
- A. 3.01 x 10^23
- B. 6.02 x 10^23
- C. 3.01 x 10^20
- D. 6.02 x 10^24
Explanation
To find the number of moles in 6 mg, first convert mg to grams i.e 6 mg=0.006 gNow divide 0.006g by the molar mass of carbon:(0.006 g) / (12 g/mol) = 0.0005 molSince there are 6.02 x 1023 carbon atoms in one mole of carbon, we can calculate the number of carbon atoms in 0.0005 mol:0.0005 mol x 6.02 x 1023 atoms/mol = 3.01 x 1020 atoms. To summarize, the correct answers is 3.01 x 1020, both representing the number of carbon atoms in 6 mg of a graphite piece.
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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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