brandreyalniver brandreyalniver
  • 22-10-2016
  • Chemistry
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How many moles of o atoms are there in 25.0 g of hno3?

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Edufirst
Edufirst Edufirst
  • 03-11-2016
HNO3 molar mass = 1 + 14 +3*16 = 63 g/mol

# of moles = mass / molar mass - 25.0 g / 63 g = 0.3968 moles

# of atoms = # of moles * Avogadro number = 0.3968 mol * 6.022 *10^23 atoms/mol = 2.39 * 10^23 atoms
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