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3 years ago

Which element is most common in sea water?

Chemistry

1 answer:

SVEN [57.7K]3 years ago

4 0

Answer:

The answer is (B.) Chlorine

Explanation:

Its because i took the test

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Calculate the mass of nitric acid required to make a 250mL solution with 2.40 ph

meriva

The mass of nitric acid required to make the given solution is 0.0627 g.

The given parameters:

Volume of the acid, V = 250 mL
pH of the acid, = 2.4

The hydrogen ion (H⁺) concentration of the nitric acid is calculated as follows;

$H^+ = 10^{-pH}\\\\H^+ = 10^{-2.4}\\\\H^+ = 0.00398$

The molarity of the nitric acid is calculated as follows;

$= 0.00398 \ H^+ \times \frac{1 \ M \ HNO_3}{1 \ H^+} \\\\= 0.00398 \ M$

The number of moles of the nitric acid is calculated as follows;

$moles = M\times L\\\\moles = 0.00398\ M \ \times \ \frac{250 \ mL}{1000} \\\\moles = 9.95 \times 10^{-4} \ mol.$

The molar mass of nitric acid is calculated as;

$HNO_3 = (1) \ + (14) \ + (16 \times 3) = 63 \ g/mol$

The mass of the nitric acid contained in the calculated number of moles is calculated as;

$mass = moles\ \times \ molar \ mass\\\\mass = 9.95\times 10^{-4} \ mol. \ \times \ 63 \ g/mol\\\\mass = 0.0627 \ g$

Thus, the mass of nitric acid required to make the given solution is 0.0627 g.

Learn more about molarity of acids here: brainly.com/question/13864682

3 0

2 years ago

A buffer solution contains 0.20 mol of propionic acid (CH3CH2COOH) and 0.25 mol of sodium propionate (CH3CH2COONa) in 1.50 dm3.

const2013 [10]

Answer:

I don't know how to do it the subject

6 0

3 years ago

How many protons are there in H2S ?

Vinvika [58]

16. Hope this helps!!

3 0

3 years ago

5. Which of the following has variable composition A. Water B. sugar C, soil D. Salt

erica [24]

Answer:

C. Soil

Explanation:

The choice with variable composition is the soil. Soil have many different composition.

Soil is made up of minerals, organic matter , water and soil air.
Soil minerals are derived from weathered bedrock materials that have been broken down into small pieces.
Organic matter is derived from dead and decaying materials from plants and animals.
All these materials combine together to form a soil.

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3 years ago

How do scientists test their ideas

-Dominant- [34]

I think it’s B not rlly sure

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3 years ago