The unit used to express the relative atomic mass is called?
Correct answer: D. Atomic mass unit
- A. Gram unit
- B. Avogadro's number
- C. Atomic mass
- D. Atomic mass unit
Explanation
One atomic mass unit (1amu) is a mass unit equal to exactly one-twelfth (1/12th) the mass of one atom of carbon-12 isotope, which is the scale used to compare atomic masses. So, the unit used to express relative atomic mass is amu. Thus, option D is correct.
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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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