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Mashcka [7]
2 years ago
9

Need help on this question

Chemistry
1 answer:
o-na [289]2 years ago
5 0

Answer:

It is the  2nd one

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One mole (abbreviated mol) is equal to 6.022×1023 molecular entities (Avogadro's number), and each element has a different molar mass depending on the weight of 6.022×1023 of its atoms (1 mole). The molar mass of any element can be determined by finding the atomic mass of the element on the periodic table.
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What is the ph of a solution that has a poh of 11.24
galina1969 [7]
Always remember that pH + pOH = 14 
Here, you have a pOH of 11.24, so  you replace it in the equation, and u get:
pH + 11.24 = 14

Then, You move 11.24 to the other part. and moving from a part to another change the sign of the equation. And you get:
pH = 14 - 11.24 = 2.76

So, the pH of a solution that has a pOH of 11.24 is pH = 2.76

Hope this Helps :)
7 0
3 years ago
What is the mass of 5.84 × 10^21 atoms of xenon?
podryga [215]

Answer:

5.84e+21

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Iron (III) bromide reacts with sodium hydroxide to produce iron (III) hydroxide and sodium bromide. Write the balanced chemical
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3 NaOH + FeBr3 = 3 NaBr + Fe(OH)3

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