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3 years ago

How do I know if covalent compounds are polar bond by only seeing their chemical formula?

Chemistry

1 answer:

NNADVOKAT [17]3 years ago

3 0

if the compound is made of just two elements, if one is a metal (ie belongs to any of groups 1, 2 or 3) and the other element a non metal, (ie belongs to group 5, 6 or 7) then the compound is most likely to be an ionic compound. For example NaCl, MgO
If the compound is made of identical non metalic elements as in O2, Cl2 then the compound is covalent
If the compoud is made of just two elements that are both non metals such as in SO2, CO, NO, CCl4, the compound is covalent
If the compound is made up of more than two elements, such as in HNO3, Na2CO3, CuSO4.5H2O, you may need to break the compound into dissociating parts. You will see that, the compounds are ionic.
Hydrocarbons, compounds containing only hydrogen and carbon of varying molecular size are all covalent. Examples are C2H6, C2H4, C2H2

Note that there could be some little exceptions to the examples given. Mostly with first members of every group because of their small size which make them show substantial deviations from group behavior. For example HCl is covalent not ionic.

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Kruka [31]

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3 years ago

Which of the following is the correct Lewis structure for methane (CHA)?

Mkey [24]

The correct lewis structure of methane(CH4)

C. H:C:H:H

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3 years ago

If you help me, I will mark you as most Brilliance. I will also give you 5 Stars... !<br> .

pashok25 [27]

Answer:

It is c

Explanation:

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3 years ago

Which one of the following quantities is generally not obtainable from a single heating or cooling curve of a substance, measure

Keith_Richards [23]

Answer:

C. triple point

Explanation:

It is rare for a substance to have a triple point at 1 atm, so you can't measure it if you are limited to 1 atm.

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4 0

4 years ago

Boiling point of a solution formed when 15.2 grams of CaCl2 dissolves in 57.0 g of water. kB= 0.512 c/m.

Nookie1986 [14]

100.133 degree celsius is the boiling point of the solution formed when 15.2 grams of CaCl2 dissolves in 57.0 g of water.

Explanation:

Balanced eaquation for the reaction

CaCl2 + 2H20 ⇒ Ca(OH)2 + HCl

given:

mass of CaCl2 = 15.2 grams

mass of the solution = 57 grams

Kb (molal elevation constant) = 0.512 c/m

i = vont hoff factor is 1 as 1 mole of the substance is given as product.

Molality is calculated as:

molality = $\frac{grams of solute}{grams of solution}$

= $\frac{15.2}{57}$

= 0.26 M

Boiling point is calculated as:

ΔT = i x Kb x M

= 1 x 0.512 x 0.26

= 0.133 degrees

The boiling point of the solution will be:

100 degrees + 0.133 degrees (100 degrees is the boiling point of water)

= 100.133 degree celcius is the boiling point of mixture formed.

4 0

3 years ago

How do I know if covalent compounds are polar bond by only seeing their chemical formula?​

How do I know if covalent compounds are polar bond by only seeing their chemical formula?