11.2 07 dm³ of methane at STP has _ moles of hydrogen atoms
Correct answer: B. 2
- A. 4
- B. 2
- C. 8
- D. 16
Explanation
Volume= moles x 22.4dm3(in STP)Volume/22.4 = moles11.207/22.4 = 0.5 moles of methane. Moles of hydrogen can be calculated by mole ratio method.1 moles of methane has 4 hydrogen.Methane : Hydrogen1 : 40.5 : XX= 2 moles of hydrogen.
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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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