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scZoUnD [109]
3 years ago
10

What are five objects that are luminous

Chemistry
1 answer:
Nastasia [14]3 years ago
5 0
Some examples:
- the sun
- a flashlight turned on
- a light bulb
- stars
- fireflies
...hope i helped :)
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What is the pH of a 6.7 x 10^−5 M H+ solution?
lyudmila [28]

Answer:

pH = 4.17

Explanation:

According to the molar concentration you stated, pH of the solution is: 4.17

Remember that pH = - log [H⁺]

and [H⁺] = 10^-pH

When:

pH > 7 →  Basic solution

pH = 7 → Neutral solution

pH < 7 → Acid solution

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Are the following solutions acidic, basic, ot neutral.
Slav-nsk [51]

Answer:

1) Basic

2) Basic

3) Acidic

Explanation:

pH of a solution is a measure of the H3O+ ions in the solution and hence reflects its acidity.

pH = -log[H3O+]

Solutions are classified as acidic, basic or neutral based on the pH range

-pH < 7, acidic

- pH = 7, neutral

- pH > 7, basic

1) [H3O+] = 2.5*10^-9M

pH = -log[H3O+]=-log[2.5*10^{-9}]=8.60

Since pH > 7, solution is basic

2)[OH-] = 1.6*10^-2M

pOH = -log[OH-]=-log[1.6*10^{-2}]=1.80

pH = 14 - pOH = 14 - 1.80 =12.2

Since pH > 7, solution is basic

3) [H3O+] = 7.9*10^-3M

pH = -log[H3O+]=-log[7.9*10^{-3}]=2.10

Since pH < 7, solution is acidic

6 0
3 years ago
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