6.4 The Mole: Conversions to Atoms and Molecules
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How many formula units are in 24.0 grams of FeF3?
1.281×10^23 formula units
A block of lead weighs 11.3 grams. How many atoms of lead are in this sample?
3.28×1022 atoms
A 430 g sample of N2I6 would contain how many molecules?
3.3×10^23 molecules
A sample of sulfur trioxide (SO3) weighs 5100 g. How many molecules are contained in this sample? Use 80.063gmol for the molar mass of SO3.
3.8 x10^2
What is the mass in grams of 1.00×106 sodium atoms?
3.818×10^−17 g
What is the average mass in grams of one uranium atom (U)?
3.953x10^-22 g
Calculate the number of atoms in 37.1 grams of LiBr.
5.15×10^23
A sample of lithium has a mass of 0.0624 grams. How many atoms are present in this sample?
5.41×10^21 atoms