Based on your "Reference Tables For Physical Setting/CHEMISTRY". Answer the following question based on Table H "Vapor Pressure of Four Liquids".

1)Which of the substances has the lowest boiling point?
2)Which of the substances has a boiling point of 100˚C?
3)Which of the substances has the highest boiling point?
4)Which of the substances has the highest vapor pressure at 40˚C?
5)Which of the substances will boil at 79˚C?
6)At what temperature will alcohol boil when the atmospheric pressure is 50 kPa?
7)At what atmospheric pressure will propanone boil at 20˚C?
8) At what atmospheric pressure will water boil at 90˚C?
9)Which of the substances above has the lowest vapor pressure at 70˚C?
10)As the pressure decreases, the boiling point of water:
(a) increases
(b) decreases
(c) remains the same
11)What is the vapor pressure of water at 60˚C?

1)Which of the substances has the lowest boiling point?

Explanation:

1)Which of the substances has the lowest boiling point?

2)Which of the substances has a boiling point of 100˚C?

3)Which of the substances has the highest boiling point?

4)Which of the substances has the highest vapor pressure at 40˚C?

5)Which of the substances will boil at 79˚C?

6)At what temperature will alcohol boil when the atmospheric pressure is 50 kPa?

7)At what atmospheric pressure will propanone boil at 20˚C?

8) At what atmospheric pressure will water boil at 90˚C?

9)Which of the substances above has the lowest vapor pressure at 70˚C?

10)As the pressure decreases, the boiling point of water:

(a) increases

(b) decreases

(c) remains the same

11)What is the vapor pressure of water at 60˚C?

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answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

if you need further assistance, let me know: )

~ trueboss72

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.