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Ray Of Light [21]
3 years ago
15

How many moles of Fe2O3 are in 203 g of the compound?

Chemistry
1 answer:
ruslelena [56]3 years ago
6 0
The equation is :
moles=mass/molar mass
so, the mass is 203 and molar mass is 159.69 
You divide the 203 by 156.69 as the equation shows
so the moles is 1.27 mol. 
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Explain the connection between periods and energy levels.
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How much potassium chloride is needed to make 0.500 m solution with 1.50 L of water?
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55.9 g KCl.

Explanation:

Hello there!

In this case, according to the definition of molality for the 0.500-molar solution, we need to divide the moles of solute (potassium chloride) over the kilograms of solvent as shown below:

m=\frac{mol}{kilograms}

Thus, solving for the moles of solute, we obtain:

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Since the density of water is 1 kg/L, we obtain the following moles:

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Regards!

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