27. The mass of 1 u is(1)23 g1 112 6.022 10 (2)231 g6.022 10(3)2312 g6.022 10(4) 6.022 × 1023 g
Question
27. The mass of 1 u is
(1) 23 g 1 112 6.022 × 10\n (2) 231 g 6.022 × 10\n (3) 2312 g 6.022 × 10\n (4) 6.022 × 10²³ g
Solution
The question seems to be asking for the mass of 1 atomic mass unit (u). The correct answer is (4) 6.022 × 10^23 g. This is because 1 atomic mass unit (u) is defined as one twelfth (1/12th) of the mass of an atom of carbon-12. The mass of a carbon-12 atom is approximately 12 g/mol. Since 1 mol of any substance contains Avogadro's number of particles (6.022 × 10^23), the mass of 1 u is 1/ (6.022 × 10^23) g, or equivalently, 6.022 × 10^23 u is 1 g.
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