The gem emerald is a pure crystal of the mineral beryl, Be3Al2(SiO3)6 How many atoms of beryllium would be in 134.35 grams of beryl?

6. Which among the following amounts contains the most number of atoms?

a. 2.0 grams of potassium metal

b. 0.3 moles of hydrogen atoms

c. 1.204 x 1021 atoms of sulfur

d. 1.27 grams of iodine

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