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2 years ago

Why people in different parts of the world wear differet clothes

Chemistry

1 answer:

Svet_ta [14]2 years ago

5 0

Answer:

People around the world wear different clothes because the way of life of people is different around the world..

The culture and heritage of the people around the world also varies...

Not only is it clothes, but food, language etc also varies as it depends on the culture and heritage as earlier said.

Happy to help

Pls mark as Brainliest

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Why krypton and noble gas are not used in airships using the periodic table?

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Answer:

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3 years ago

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3 years ago

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2 years ago

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3 years ago

Calculate the pH of: (a) 0.1M HCl; (b) 0.1M NaOH; (c) 3 X 10% M HNO3; (d) 5 X 10-10 M HCIO.; and (e) 2 x 10-8 M KOH.

Shtirlitz [24]

Answer:

(a) $pH = -Log (0.1M) = 1$

(b) $pH = -Log (10^{-13}M) = 13$

(d) $pH = -Log (4.93x10^{-10}M) = 9.3$

(e) $pH = -Log (5^{-7}M) = 6.3$

Explanation:

To calculate de pH of an acid solution the formula is:

$pH = -Log ([H^{+}]) = 1$

were [H^{+}] is the concentration of protons of the solution. Therefore it is necessary to know the concentration of the protons for every solution in order to solve the problem.

(a) and (c) are strong acids so they dissociate completely in aqueous solution. Thus, the concentration of the acid is the same as the protons.

(b) and (e) are strong bases so they dissociate completely in aqueous solution too. Thus, the concentration of the base is the same as the oxydriles. But in this case it is necessary to consider the water autoionization to calculate the protons concentration:

$K_{w} =[H^{+} ][OH^{-}]=10^{-14}$