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2 step mole conversions 1. How many particles are in 12.47 grams of NaCl 2. How many grams are in 4.23 x 10^24 atoms of He?
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- Roger the MoleLv 73 years agoFavorite Answer
1. Supposing "particles" to mean "atoms":
(12.47 g NaCl) / (58.4430 g NaCl/mol) x (6.022 x 10^23 formula units/mol) x (2 atoms/1 formula unit) = 2.570 x 10^23 atoms
2.
(4.23 x 10^24 atoms He) / (6.022 x 10^23 atoms/mol) x (4.0026 g He/mol) = 28.1 g He
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