Answered

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How many oxygen atoms are in 25 g of oxygen?

Sagot :

Answer:

Explanation:

Carbon Dioxide-CO2

To get molecules, we must convert grams to moles and moles to atoms using Avogadro's number.

Molar mass of CO2=

C:12.0g+O:16.0gx2=44.0g CO2

25.0g CO2 | 1 mol CO2 | 6.02x10 23 molecules CO2

= 3.42x10 23 molecules CO2

1 | 44.0g CO2 | 1 mol CO2

Now to get the number of oxygen atoms.

Since there are 3 atoms in CO2 and 2 of them are oxygen, we will divide by 3 (1.14x10 23) and multiply by 2 (2.28 x10 23)

So the number of oxygen atoms in 25.0 grams of CO2 is 2.28x10 23 or 228 000 000 000 000 000 000 000

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