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Heating will decompose silver oxide, Ag2O, to silver metal, Ag, plus oxygen gas, O2. How many moles of oxygen gas will form when 4.64 g of solid silver oxide is decomposed? The formula mass of silver oxide is 232 g/mol.

0.100 mol.

0.0200 mol.

0.0150 mol.

0.0100 mol.

Respuesta :

kenmyna
The moles  of oxygen  gas that  form when 4.64 g  of solid silver oxide  decomposes  is calculated as  below

calculate the moles  of Silver  oxide that  decoposed

moles = mass/molar mass

= 4.64 g/232 g/mol = 0.02 moles

write the balanced reacting  equation

2Ag2O =4 Ag + O2

from the equation above  the reacting  ratio between Ag2O to O2 is 2:1, therefore the  moles of O2

= 0.02 x 1/2 = 0.01 moles of oxygen

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