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3 years ago

I NEED HELP!!

1 answer:

3 0

Carboxylic acids and alcohols have higher boiling point than other hydrocarbons due to their polarity and from the fact that they form very strong intermolecular hydrogen bonding. This is due to the large difference in their electronegativity that forms between the oxygen and the hydrogen atom.

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You are given a silver rod, copper plate and copper sulphate solution. Explain the arrangements you will do to get coating of co

Mandarinka [93]

U VORBELLO FRANÇAIS???

6 0

3 years ago

HELP IT’S ABOUT TO BE DUE!

Vinil7 [7]

The answer is b
Explanation:

7 0

3 years ago

Sodium is much more apt to exist as a cation than chlorine because:

8090 [49]

Answer:

(D) chlorine has a greater ionization energy than sodium

Explanation:

Sodium is the element of the group 1 and period 3 which means that the valence electronic configuration is $[Ne]3s^1$ .

Chlorine is the element of the group 17 and period 3 which means that the valence electronic configuration is $[Ne]3s^23p^5$ .

Ionization energy is the minimum amount of energy which is required to knock out the loosely bound valence electron from the isolated gaseous atom.

Thus, removal of one electron in sodium is easy as it will gain noble gas configuration and become stable. But this case does not exist in chlorine and hence, chlorine has a greater ionization energy than sodium.

So,

Sodium is much more apt to exist as a cation than chlorine because chlorine has a greater ionization energy than sodium.

7 0

3 years ago

Which statement concerning elements is true? (1) Different elements must have different numbers of isotopes. (2) Different eleme

Lana71 [14]

Answer:

(4) All atoms of a given element must have the same atomic number

Explanation:

Atomic number : It is defined as the number of electrons or number of protons present in a neutral atom.

However, when we talk about the atomic number of the ion, it is not equal to the number of electrons as electron can be gained or loosed.

This is why, more appropriately, the number of the protons which are present in the nucleus of the atom is called the atomic number.

Mass number is the number of the entities present in the nucleus which is the equal to the sum of the number of protons and electrons.

Mass number = Number of protons + Number of neutrons

Thus, atomic number of an element is an unique property of the element and it's atom.

8 0

3 years ago

How many atoms are in .83 mol hydrogen

horrorfan [7]

No of moles=0.83mol

$\\ \tt\longmapsto No\:of\:atoms=No\:of\:moles\times Avagadro's constant$

$\\ \tt\longmapsto No\:of\: atoms=0.83(6.022\times 10^{23})$

$\\ \tt\longmapsto No\:of\: atoms=4.99\times 10^{23}$

3 0

2 years ago