Which of the following should NOT break up into, or form, ions when dissolved in water?

1 answer:

3 0

Even though this question might seem too complicated, the correct answer is hiding in the last option from the scale represented above : <span>
Molecular compounds such as H2O. As all we know, water will dissolve in water, although won't break into ions. Hope it helps!</span>

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If 4.50 l of water vapor at 50.2 °c and 0.121 atm reacts with excess iron, how many grams of iron(iii) oxide will be produced?

Flura [38]

When the balanced equation for this reaction is:
2Fe + 3H2O → Fe2O3 + 3H2

and according to the vapour pressure formula:
PV= nRT
when we have P is the vapor pressure of H2O= 0.121 atm
and V is the volume of H2O = 4.5 L
and T in Kelvin = 52.5 +273 = 325.5 K
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So we can get n H2O
So, by substitution:
n H2O = PV/RT
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we can get the Mass of Fe2O3 from this formula:
Mass = number of moles * molecular weight
when we have a molecular weight of Fe2O3 = 159.7
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