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PilotLPTM [1.2K]
3 years ago
9

Hardest question that nobody can answer about diffusion​

Chemistry
1 answer:
valkas [14]3 years ago
7 0

Is the movement of a substance from an area of high concentration to an area of low concentration

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8. Rewrite each of the following as an "ordinary” decimal
saveliy_v [14]

Answer:

????????

Explanation:

3 0
3 years ago
3.
swat32

Answer:

14.7838

Explanation:

Given that;

A student uses a solution that contains 16 g of water to conduct an experiment and at the end of an hour ; the amount have decreased by 3.5%

The mathematically illustration for this is given as

= 16 g ×  3.5%

= 16 *\frac{3.5}{100}

= 0.56  

After an hour; the amount have decreased by 16 - 0.56

= 15.44

after 2 hours the water decreased by another 4.25%

i.e  15.44 * \frac{ 4.25}{100}

⇒ 0.6562

after two hours , the amount would have decreased by:

= 15.44 - 0.6562

= 14.7838

3 0
3 years ago
Determine the molar mass of CaO
Umnica [9.8K]
56.0774 g/mol just took the test
5 0
3 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
- a) write the formula unit of calcium fluoride.
san4es73 [151]

Answer:

Practice

Look at the pictures and write about Faris's day. Use time words

35words 40words * 50 words ***

TUD

Writing checkout

Olused capital letters at the beginning of sentences. Olsusea finger espace between e

the pictures (I will describe it by words)first picture the boy returns from school the sec picture is I return and eat with the family and the third picture is I played with my sister and the fourth is I watch TV with my siblings and the last picture is I take the book and study ,in order write a story using this pictures that I describe it.

6 0
3 years ago
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