A metal "M" reacts with "S" to form "MS". If 3.6g of M reacts with 0.09 mole of sulfur then what is the name of metal "M"?
Correct answer: B. Ca
- A. Cr
- B. Ca
- C. Mg
- D. Mn
Explanation
M+S-4 MSStoichlometrically, S:MI mole: I mole0.09 mole: 0.09 moleand 0.09 mole of M = 3.6gI mole of M =3640g or Ca.0.09
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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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