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Greeley [361]
3 years ago
9

Water has a higher boiling point than expected because A. there is so much water vapor in the atmosphere. B. water molecules are

not very massive. C. hydrogen and oxygen form single covalent bonds. D. of the strong attractions between polar water molecules
Chemistry
2 answers:
IRISSAK [1]3 years ago
8 0
The correct answer is C. Water has a higher boiling point than expected because hydrogen and oxygen form single covalent bonds. Molecules of water is bound together by strong attractions which needs high energy to break resulting to a higher boiling point of water than most substances.
Reika [66]3 years ago
5 0

Answer:

actually the correct answer is d of the strong attractions between polar water molecules

Explanation:

i just took the quiz

the answers for the quiz is:

c

d

d

d

d

b

b

d

this is for the connections quiz for

atoms elements and bonds practice

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All of the halogens, group 17, have seven valence electrons. which of these would represent the oxidation number of the halogens
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It depends if it occurs naturally it has oxidation number of 0
but when it react with other element it has an oxidation number of -1
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2 years ago
HELP PLEASE I HAVE A TEST TODAY AND I DON'T UNDERSTAND ANY OF THIS...
myrzilka [38]

Answer:

About 67 grams or 67.39 grams

Explanation:

First you would have to remember a few things:

 enthalpy to melt ice is called enthalpy of fusion.  this value is 6.02kJ/mol

  of ice  

 it takes 4.18 joules to raise 1 gram of liquid water 1 degree C

 water boils at 100 degrees C and water melts above 0 degrees C

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  water's enthalpy of vaporization (steam) is 40.68 kJ/mol

  a mole of water is 18.02 grams

  we also have to assume the ice is at 0 degrees C

Step 1

Now start with your ice.  The enthalpy of fusion for ice is calculated with this formula:

q = n x ΔH    q= energy, n = moles of water, ΔH=enthalpy of fusion

Calculate how many moles of ice you have:

150g x (1 mol / 18.02 g) = 8.32 moles

Put that into the equation:

q = 8.32 mol x 6.02 = 50.09 kJ of energy to melt 150g of ice

Step 2

To raise 1 gram of water to the boiling point, it would take 4.18 joules times 100 (degrees C)  or 418 joules.

So if it takes 418 joules for just 1 gram of water, it would take 150 times that amount to raise 150g to 100 degrees C.  418 x 150 = 62,700 joules or 62.7 kilojoules.

So far you have already used 50.09 kJ to melt the ice and another 62.7 kJ to bring the water to boiling.  That's a total of 112.79 kJ.

Step 3

The final step is to see how much energy is left to vaporize the water.

Subtract the energy you used so far from what you were told you have.

265 kJ - 112.79 kJ = 152.21 kJ

Again q = mol x ΔH (vaporization)

You know you only have 152.21 kJ left so find out how many moles that will vaporize.

152.21 kJ = mol x 40.68  or   mol = 152.21 / 40.68  = 3.74 moles

This tells you that you have vaporized 3.74 moles with the energy you have left.

Convert that back to grams.

3.74 mol   x  ( 18.02 g / 1 mol ) = 67.39 grams

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2 years ago
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Answer:

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Explanation:

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Answer:

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Reactants:

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Other names: Hydrochloric acid
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Appearance: Brown-black solid Black-to-brown powder

Products:

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Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas

Explanation:

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