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Keith_Richards [23]
2 years ago
11

How many atoms of each element are present in 3.2 moles of k2so3

Chemistry
2 answers:
RideAnS [48]2 years ago
7 0

Answer:- 3.85*10^2^4 atoms of K, 1.93*10^2^4 atoms of S and 5.78*10^2^4 atoms of O.

Solution:- We have 3.2 moles of K_2SO_3 . Looking at it's molecular formula, it has two K, one S and three O. It means, 1 mole of the compound has two moles of K, one mole of S and 3 moles of O.

Now we could calculate the moles of each present in 3.2 moles of the compound as..

So, moles of K = 3.2 mol of compound x (2 mol K/mol of compound) = 6.4 mol K

moles of S = 3.2 mol of compound x (1mol S/1mol compound) = 3.2 mol S

moles of O = 3.2 mol of compound x (3 mol O/1mol compound) = 9.6 mol O

Now to convert the moles of each to atoms, we multiply by Avogadro number.

atoms of K = 6.4 mol x (6.022 x 10^23 atoms/1mol) = 3.85*10^2^4 atoms of K

atoms of S = 3.2 mol x (6.022 x 10^23 atoms/1mol) = 1.93*10^2^4 atoms of S

atoms of O = 9.6 mol x (6.022 x 10^23 atoms/1mol) = 5.78*10^2^4 atoms of O

Irina-Kira [14]2 years ago
5 0
1.9264*10^23  is the answer
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Natural gas (CH4) has a molar mass of 16.0 g/mole. You started out the day with a tank containing 200.0 g of natural gas. At the
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Considering the definition of molar mass, the moles of gas used are 10.625 moles.

<h3>Definition of molar mass</h3>

The molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.

<h3>Amount of moles used</h3>

Natural gas has a molar mass of 16.0 g/mole.

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At the end of the day, your tank contains 30.0 g of natural gas. So, you can apply the following rule of three: If by definition of molar mass 16 grams are contained in 1 mole, 30 grams are contained in how many moles?

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The number of moles used will be the difference between the number of moles used initially and the contents at the end of the day.

moles used= amount of moles at the beginning - amount of moles at the end

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<u><em /></u>

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