3 years ago

Draw an atomic model from1 to 20 elements with their symbol valency and electronic configuration

Chemistry

1 answer:

ale4655 [162]3 years ago

3 0

Answer:

MARK AS THE BRAINLIEST ANSWER

Explanation:

BRAINLIEST

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2 years ago

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Mandarinka [93]

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An acid with the general formula RCOOH is used to make a 0.10 M solution in water. The pH of this acid solution is measured as 3

Sati [7]

Answer:

0.159 \%

Explanation:

The acid will dissociate according to the reaction shown below:-

$RCOOH + H_2O\rightleftharpoons RCOO^- + H_3O^+$

Given that, pH=3.8

The concentration of can be determined from the expression fo pH as:-

pH = - log $[H^+]$

3.8 = - log $[H^+]$

$[H^+]$ = $1.59\times 10^{-4}\ M$

The initial concentration of RCOOH was 0.10 M, then the percent dissociation was- calculated as shown below:-

$\% \ dissociation=\frac{1.59\times 10^{-4}}{0.10}\times 100=0.159\ \%$

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2 years ago

Why is it difficult to prove the Law of Conservation of Mass when a gas is produced?

Fofino [41]

Answer:

It is difficult to prove the law of conservation of mass when a gas is produced because the gas molecules move quickly into the outside space and away

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2 years ago

Which substance represents a compound? 1. CS2 (s) 2. Cs (s) 3. C (s) 4. O2 (9)

aleksandr82 [10.1K]

A compound is composed of 2 or more different elements and or atoms, and thus 1. CS2 would be a compound for the above reason.

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3 years ago

Draw an atomic model from1 to 20 elements with their symbol valency and electronic configuration​

Draw an atomic model from1 to 20 elements with their symbol valency and electronic configuration