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Oksana_A [137]
3 years ago
14

Which of the following is the correct sequence for the discovery of subatomic particles? a Electrons> Protons > Neutrons b

Protons> Electrons> Neutrons C Electrons> Neutrons > Protons d Neutrons> Electrons > Protons​
Chemistry
2 answers:
Inessa05 [86]3 years ago
8 0

Answer:

It is A

Explanation:

laila [671]3 years ago
4 0

Answer:

C

Explanation;

Maybe is C

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11. A chemical reaction happens when chemicals combine to form a new _______
Oxana [17]

Answer:

substances

Explanation:

A chemical reaction happens when substances break apart or combine to form one or more new substances.

<u><em>^Hope it helps, Hazel^</em></u>

6 0
3 years ago
Find the hydrogen ion concentration of a saturated solution of calcium hydroxide whose ph is 13. 1
salantis [7]

The pH of the solutions is 12.67.  

     

<h3>What is pH of a Solution?</h3>

pH is the measurement of how acidic or basic a solution is. The range of pH values is from 0 to 14. Lower pH values mean higher acidity, while higher pH means higher basicity. If the pH value is equal to 7, then the solution is neutral.

To calculate the pH of the solution, a few approaches are possible. Here, the pOH of the solution is calculated first using the molar concentration of  OH^{-1} ions. Because pH + pOH = 14, the pH of the solution can then be calculated by subtracting pOH from 14.

Because 2 moles of OH^{-1} ions are formed per mole of Ca(OH)_{2}dissolved, the pOH of a saturated Ca(OH)_{2} solution at  20^{.C} is,  

Concentration (C_{OH}) of OH^{-1} ions,

          C_{OH}   = 0.02335 mol Ca(OH)_{2}/L  X 2 mol OH^{-1} /1 mol Ca(OH)_{2}

            C_{OH} = 0.0467 mol OH^{-1}/L

*pOH of saturated Ca(OH)_{2} solution,

                                   pOH = -log [C_{OH}]

                                   pOH = -log [0.0467 mol OH^{-1}/L ]            

                                  pOH = 1.33  

*pH of saturated Ca(OH)_{2} solution,

                                   pH = 14 - 1.33

                                   pH = 12.67

Hence, the pH of the solutions is 12.67.

Learn more about  pH of the solutions here:

brainly.com/question/6988456

#SPJ4

4 0
2 years ago
ASAP PLEASEE
Agata [3.3K]

Seven diatomic elements are H₂, Cl₂, N₂, F₂, Br₂, I₂ and O₂.

<h3>Which are diatomic molecules?</h3>

Diatomic molecules are those molecules in which two atoms of same elements are present, and they are combined to attain the stability.

The seven diatomic molecules which are exist in the chemistry are:

  • Hydrogen gas (H₂)
  • Chlorine gas (Cl₂)
  • Nitrogen gas (N₂)
  • Fluorine gas (F₂)
  • Bromine gas (Br₂)
  • Iodine gas (I₂)
  • Oxygen gas (O₂)

Hence H₂, Cl₂, N₂, F₂, Br₂, I₂ and O₂ are 7 diatomic molecules.

To know more about diatomic molecules, visit the below link:
brainly.com/question/14466404

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7 0
2 years ago
The three isomers of pentane have different
8_murik_8 [283]
The three isomers of pentane have different structural formulas.
8 0
3 years ago
Read 2 more answers
Who discovered electron ???
Zanzabum

It was a Cambridge UK scientist in the early part of the 20 th century who discovered the electron. His name was J J Thompson.

5 0
4 years ago
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