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How many moles of argon are in 13.9 g of argon?

Sagot :

CrystalQueen

Answer:

0.348 moles Ar

Explanation:

You can determine the moles of argon (Ar) by multiplying the given mass by the atomic mass of argon. This number gives the mass in grams per 1 mole. It is important to arrange the conversion in a way that allows for the cancellation of units. The final answer should have 3 significant figures to match the sig figs of the given value (13.9 = 3 sig figs).

Atomic Mass (Ar): 39.948 g/mol

 13.9 g Ar              1 mole
-----------------  x  ------------------  =  0.348 moles Ar
                            39.948 g

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