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ra1l [238]
3 years ago
10

Can you always tell by looking at a substance if it is pure or not? ​

Chemistry
1 answer:
Hunter-Best [27]3 years ago
5 0

Answer:

nope

Explanation:

bcoz every thing we look that isn't real. some substance are chemically changed and some are physically changed.if the physical change occurs then it is temporary change and if chemical change occurs it is permanent change.

Conclusion:I can think this much with my tiny mind.

THANK YOU

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When there are no decomposers, what happens to the grass?
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Explanation:

I hope this helps :3

6 0
3 years ago
Read 2 more answers
Calculate the pH when 60.0 mL of 0.200 M HBr is mixed with 30.0 mL of 0.400 M CH₃NH₂ (Kb = 4.4 × 10⁻⁴).
Mariulka [41]

When a volume of 60.0 mL of 0.200 M HBr is mixed with a volume of 30.0 mL of 0.400 M CH3NH2, The pH value is mathematically given as

pH=10.64

<h3>What is the pH value when 60.0 mL of 0.200 M HBr is mixed with 30.0 mL of 0.400 M CH₃NH₂?</h3>

Question Parameters:

The pH when 60.0 mL of 0.200 M HBr

30.0 mL of 0.400 M CH₃NH₂ (Kb = 4.4 × 10^{-4}).

Generally, the equation for the Chemical Reaction  is mathematically given as

H Br + H_3C NH_2----- > CH_3 NH_3 Br

Therefore

oH=p^{kb}+-log\frac{salt}{base}

OH=-log(4.4*10^{-4})+\frac{0.1}{0.1}

OH=3.36

In conclusion, The equation pH value

pH+OH=14

Therefore

pH+=14-3.36

pH=10.64

Read more about Chemical Reaction

brainly.com/question/11231920

8 0
2 years ago
Why is the bond angle in a water molecule less than the bond angle of methane
Annette [7]
The bond angle in the Water Molecule is approx. 104.5 degrees. The methane molecule is approx. 109.5 degrees. The differences, is due to the force from the surrounding molecules and atoms. For example the Lone pairs of electrons.

6 0
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How do you preform water displacement
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I need help in this :(
alexandr402 [8]

Answer:

ok follow me twitter dm me for answer The Kid D is my twitter

Explanation:

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