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a2kavchuotnato a2kavchuotnato
  • 26-11-2016
  • Chemistry
Answered

How many moles are in 15.0 grams of calcium?



0.374 moles


2.67 moles


601.5 moles


2.40 x 1025 moles

Verified Answer :

Edufirst
Edufirst Edufirst
  • 28-11-2016

Use the atomic mass of calcium

Ca atomic mass = 40.1 g / mol

Now use the formula:

 mass = #moles * atomic mass, and solve for #moles

#moles = mass / atomic mass = 15.0g / 40.1g/mol = 0.374 mol

Answer: 0.374 moles

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