The pH indicators to be used are Phenolphthalein, Red cabbage, Bromthymol blue and Congo red.
<h3>What are pH indicators?</h3>
Indicators are substances which change color as the pH of a medium changes.
The common indicators and their pH range is as follows:
- Phenolphthalein - pH range of 8.3 and 10.5
- Red cabbage - pH 2 to 10
- Bromthymol blue - 6.0 to 7.6
- Congo red - 3.0 to 5.2
Therefore, the indicators to be used are Phenolphthalein, Red cabbage, Bromthymol blue and Congo red.
Learn more about pH indicators at: brainly.com/question/13779537
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Answer:
No, and yes. As there is a finite amount of matter in the
universe, only so much can be converted to make energy. There will
be a limit, though it is a long, long way from where we are
Explanation:
Answer:
0.852 mol
Explanation:
First we <u>convert 4.00 g of helium (He) into moles</u>, using its <em>molar mass</em>:
4.00 g ÷ 2 g/mol = 2 mol He
To answer this problem we can use<em> Avogadro's law</em>, which states that at constant pressure and temperature:
V₁n₂=V₂n₁
Where:
We <u>input the data</u>:
- 24.4 L * n₂ = 10.4 L * 2 mol
And <u>solve for n₂</u>:
