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What is meant by the term "Mole"? Calculate the number of moles in(a) 3.011 x 1023 atoms of C.32 g of Oxygen gas.(Given: Avogadros number- 6.022 x 102B mol 1.Atomic mass of 0-16 u and |
Answer» A mole of a substance is defined as: The mass of substance containing the same number of fundamental units as there are atoms in exactly 12.000 g of 12C. a)6.022*10^23 atoms form 1 mole of an elementtherefore 3.011*10^23 atoms forms, 3.011*10^23/(6.022*10^23)=0.5 molesb)Two atoms are present in Otherefore O2=16*2=32=molar massno of moles= given mass/ molar mass=32/32=1 therefore no of moles of O2= 1 |
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