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MOLES

x Molar Mass. ÷ N A. Number of Particles. Mass (g). MOLES. ÷ Molar Mass. x N A. m. n. n. #. N A. M. m = mass (g) n = moles (mol) M = molar mass (g/mol) # = number of particles N A = Avogadro’s Number ( 6.02x10 23 ___/mol).

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MOLES

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  1. x Molar Mass ÷ NA Number of Particles Mass (g) MOLES ÷ Molar Mass x NA

  2. m n n # NA M m = mass (g)n = moles (mol) M = molar mass (g/mol) # = number of particles NA = Avogadro’s Number (6.02x1023 ___/mol)

  3. Calculate the number of moles in 124.5g of oxygen gas.

  4. Calculate the molecular mass of a pure substance if 1.75 moles of the substance has a mass of 29.792g

  5. How many moles of nickel atoms are there in 80 nickel atoms?

  6. How much does 4.2 moles of Ca(NO3)2 weigh?

  7. How many atoms are in 22 grams of copper metal?

  8. How many grams do 4.3 x 1021 molecules of UF6 weigh?

  9. How many molecules are there in 230 grams of NH4OH?

  10. How many molecules are there in 9.34 grams of LiCl?

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