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Number of moles and number of atoms in a 214 gram sample of silver?
Wiki User
∙ 15y ago
According to the Periodic Table, silver (Ag) has an Atomic Mass of about 108 grams per mole. If you have 802 grams, set up a direct proportion where 108/1=802/x and solve for x. You get about 7.43 moles of silver.
Wiki User
∙ 11y ago
Wiki User
∙ 15y agoA gram to mole conversion needs to have an atomic mass. Silver's atomic mass is 107.9 grams. You take the number of grams, multiply it by the number of moles (one in this case) and divide it by the atomic mass.
214 g Ag / (107.9 g) = 1.98 moles Ag
Then you convert it to number of atoms. You can skip a step when converting grams to atoms if you have already calculated the number of moles by using the molar weight. You take the number of moles and multiply it by Avogadro's constant, 6.02 × 1023. If you start with grams, you multiply it by Avogadro's constant, then divide by atomic mass.
1.98 moles Ag × (6.02 × 1023 atoms) = 1.19 × 1024 atoms Ag
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