How many moles of sodium are present in 0.1 gram of sodium
Correct answer: A. 4.3×10-³
- A. 4.3×10-³
- B. 4.01×10-²
- C. 4.03×10-¹
- D. 4.3×10-²
Explanation
Ar of Na= 23g/mol Mole=Mass/Mr Mole= 0.1/23 Mole= 4.3x10^-3
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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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