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AnnyKZ [126]
3 years ago
6

Use sedimentary in a sentence

Chemistry
2 answers:
VMariaS [17]3 years ago
5 0
'The Sedimentary rock formed from years of sediments piling on top of it and being compressed.'
Wittaler [7]3 years ago
3 0
I have my very own collection of Sedimentary Rocks...rocks made of sediment. like pieces of sand and dirt piling on top over the years.
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Explanation:

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How to go this problem
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Question 8 (5 points)
Fynjy0 [20]

[H+][OH-]=10-¹⁴

We are using this formula because we need to find the H+

substitute the value given for hydronium ion for OH-

[H+][4.19×10⁵]=10-¹⁴

[H+]=10-¹⁴÷4.19×10⁵

[H+]=2.387×10-¹⁹

Then the pH of the solution will be

pH= –log¹⁰ [H+]

pH = –log¹⁰ [2.387×10-¹⁹]

pH= –log¹⁰2.387+19log¹⁰

= –0.378+19

pH =18.622

8 0
2 years ago
How many ml of a 4.0 M Mg(OH)2 are needed to make 750 ml of 0.2 M Mg(OH)2???
cupoosta [38]

Answer:

37.5 mL of a 4.0 M Mg(OH)₂ are needed to make 750 mL of 0.2 M Mg(OH)₂

Explanation:

Dilution is the reduction in concentration of a chemical in a solution. Dilution consists of lowering the amount of solute per unit volume of solution.

In other words, dilution is the procedure followed to prepare a less concentrated solution from a more concentrated one, and consists of adding solvent to an existing solution. The quantity or mass of the solute is not changed but only that of the solvent.

In dilutions the expression is used:

Ci*Vi = Cf*Vf

where:

  • Ci: initial concentration
  • Vi: initial volume
  • Cf: final concentration
  • Vf: final volume

In this case:

  • Ci: 4 M
  • Vi: ?
  • Cf: 0.2 M
  • Vf: 750 mL

Replacing:

4 M* Vi= 0.2 M* 750 mL

Solving:

Vi=\frac{0.2 M*750 mL}{4 M}

Vi= 37.5 mL

<u><em>37.5 mL of a 4.0 M Mg(OH)₂ are needed to make 750 mL of 0.2 M Mg(OH)₂</em></u>

8 0
2 years ago
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