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Lyrx [107]
3 years ago
6

Hydrogen bonds form between molecules containing _________ bonds; the hydrogen bond is between a hydrogen atom of one molecule a

nd a partially _________ charged atom of another.
A. polar covalent; negativelyB. polar covalent; positivelyC. nonpolar covalent; positivelyD. nonpolar covalent; negativelyE. ionic; positively
Chemistry
1 answer:
nasty-shy [4]3 years ago
5 0

Answer:

The answer is A. Polar covalent; negatively

Explanation:

Hydrogen bonds form between molecules containing polar covalent bond the hydrogen bond is been a hydrogen atom of one molecule and a partially negative charged atom of another.

Example H_{2}O (water):- It contain a slight positive charge on one side and a slight negative charge on the other.

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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

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PV= nRT
when we have P is the vapor pressure of H2O= 0.121 atm
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and T in Kelvin = 52.5 +273 = 325.5 K
R= 0.08205 atm-L/g mol-K
So we can get n H2O
So, by substitution:
n H2O = PV/RT
            = (0.121*4.5)/(0.08205 * 325.5) = 0.02038 gmol
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we can get the Mass of Fe2O3 from this formula:
Mass = number of moles * molecular weight       
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