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VARVARA [1.3K]
3 years ago
14

What are atoms?

Chemistry
2 answers:
liq [111]3 years ago
8 0

Answer:

4. particles of matter

Amanda [17]3 years ago
4 0

Answer:

The basic unit of a chemical element. The answer is 4 particles of matter.

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Which of the following does not contribute to water vapour to the atmosphere
vampirchik [111]

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<h2>Industry </h2>

Explanation:

because industry is a building not a weather or related on nature

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2 years ago
What specifically determines how much energy is available in a molecule
irina1246 [14]
Possibly the amount of electrons and energy levels in which the electrons reside

5 0
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Which of the following elements is represented by the above graphic​
kolezko [41]

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Sulfur

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2 years ago
Name: _________________ Temperature o fwater_25_degreecent.YOU MUST SHOW ALL CALCULATIONS TO RECEIVE CREDIT FOR THEM! DATA ANALY
Anton [14]

Answer:

1. 0.02 M

2. 0.01 M

3. 4×10⁻⁶

Explanation:

We know that V₁S₁ = V₂S₂

1.

Concentration of HCl = 0.05 M

end point comes at = 10 ml

So, concentration of OH⁻(aq) = [OH⁻(aq)] ⇒ (0.05 × 10) ÷ 25 ⇒ 0.02 M

2.

2mol of OH⁻(aq) ≡ 1 mole of Ca²⁺(aq)

[Ca²⁺] = 0.02 ÷ 2 = 0.01 M

3.

K_{sp} = [Ca²⁺(aq)] [OH⁻(aq)]²

Ca(OH)₂ (aq) ⇄ Ca²⁺ (aq) + 2OH⁻ (aq)

K_{sp} = [0.01 × (0.02)²] = 4×10⁻⁶

4.

If reaction is exothermic which means heat energy will get evolved as a result temperature of the reaction media will get increased during the course of the reaction. If temperature is externally increased, the reaction will go backward to accumulate extra heat energy.

5.

K_{sp} value describes the solubility of a particular ionic compound. The higher the K_{sp} value, the higher the Solubility will be.

6.

This may be due to uncommon ion effect. The process of other ions (K⁺ or Na⁺) may increase the solubility

4 0
3 years ago
Why is it necessary to obtain 25 to 50 hairs from this woman?
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To get the correct data

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