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Flauer [41]
3 years ago
10

How many atoms of Ba would be equal to 11.3 g of Ba?

Chemistry
1 answer:
matrenka [14]3 years ago
4 0

Answer:

4.96 x 10²²atoms

Explanation:

Given parameters

Mass of Ba  = 11.3g

Unknown:

Number of atoms  = ?

Solution:

To solve this problem, we need to find the number of moles of Ba first and then the number of atoms it contains.

    Number of moles  = \frac{mass}{molar mass}  

  Molar mass of Ba = 137.3g/mol

  Number of moles  = \frac{11.3}{137.3}   = 0.08mole

 1 mole of a substance contains 6.02 x 10²³ atoms

  0.08 mole of Ba will contain 0.08 x 6.02 x 10²³ atoms  = 4.96 x 10²²atoms

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