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4 years ago

What do these images model ?

Chemistry

2 answers:

ser-zykov [4K]4 years ago

8 0

I think it’s atoms please mark as brainliest im not completely sure about it but I’m in a test and need the points

jek_recluse [69]4 years ago

4 0

The answer is A

Mark Brainliest ☺☻

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suppose that hypothetical element Jovian occurs as three isotopes with mass numbers 44, 46, and 48 respectively. If, in nature,

NeX [460]

Answer:

46.2 amu

Explanation:

6 0

3 years ago

He pka values of a compound with two ionizable groups are pk1 = 4.10 and pk2 between 7 and 10. a biochemist has 10 ml of a 1.0 m

lyudmila [28]

For the reaction of weak acid:

$HA\rightleftharpoons H^{+}+A^{-}$

The Henderson-hasselbalch equation is:

$pH = pk_a+ log \frac{[A^{-}]}{[HA]}$

The concentration ratio at $pk_1$ is:

$pH = pk_1+ log \frac{[A^{-}]}{[HA]}$

Substituting the values:

$3.2 = 4.1 + log \frac{[A^{-}]}{[HA]}$

$log \frac{[A^{-}]}{[HA]} = - 0.9$

$\frac{[A^{-}]}{[HA]} = 0.126$

Now, for calculating the pk_2 value:

$pH = pk_2+ log \frac{[A^{-}]}{[HA]}$

$8 = pk_2+ log(0.126)$

$pk_2 = 8.9$

Thus, $pk_2 = 8.9$ .

5 0

3 years ago

When o-bromoanisole is treated with nanh2 in nh3 (l), a reaction proceeding via a benzyne intermediate, what two isomeric produc

Dominik [7]

When orthobromoanisole is treated with sodamide (NaNH₂) and ammonia (NH₃), benzyne is formed and the tripple bond is formed between C₂-C₃ carbon atoms of benzene ring. Then NH₂⁻ can attack at ortho position as well as meta position.

The reaction takes place in three steps. Step-1:The amide NH₂⁻ ion attacks the H -atom that is ortho to C3 , generating a carbanion. Step-2:Loss of Br - to form a benzyne intermediate.Step-3:Addition of NH₂⁻ ion. The strain caused by a triple bond in a benzene ring can be relieved by a nucleophilic addition of NH₂⁻.

Two isomeric products are formed: (1) o-methoxyaniline and (2) m-methoxyaniline. The structures of both the isomeric products are given in diagram.

6 0

3 years ago

QUICK I JUST NEED THE ANSWER!!! What's the hybridization of the central atom in OF2?

Blababa [14]

Answer:

sp3 hybridization

Explanation:

5 0

3 years ago

A research team has just discovered a new element called Likhitium. Now they need to determine the average atomic mass in order

earnstyle [38]

The question is incomplete, the complete question is shown in the image attached to this answer.

Answer:

139.13

Explanation:

The average atomic mass of the element Likhitium is the sum of the relative abundance of all the isotopes of Likhitium.

We obtain the relative atomic mass of Likhitium as follows;

(44.7/100 * 138) + (52.3/100 * 139) + (0.5/100 * 140) + (2.5/100 * 141)

61.7 + 73.2 + 0.7 + 3.53 = 139.13

Hence the relative abundance of Likhitium is 139.13

6 0

3 years ago