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Sonbull [250]
2 years ago
6

H4X - pKa1 =1.5

Chemistry
1 answer:
Nataly [62]2 years ago
8 0
Othu['oi;eejlktmkolhkjdfm;hojnor;'mor;'mor;'mor;'mor;'mor;'mhim

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NEED HELP! thank you!
Zanzabum

Answer:

This is a physical change.

Explanation:

As long as the identity of the substance has not changed, and the element is present before and after, it is a physical change! (Ex: ice melting)

7 0
3 years ago
The rate constant for a certain reaction is k = 6.50×10−3 s−1 . If the initial reactant concentration was 0.600 M, what will the
Kamila [148]

Answer: 1.037M

Explanation:

Since the rate constant unit is per seconds, therefore it is a first order reaction.

First order reaction equation is given as

InA= -kt +InAo

Where,Ao is the initial concentration of reactant =0.600M

A is the concentration of reactant at a specifies time t=3×60=180s

and k is the rate constant

InA = -6.50×10^-3 ×180 +In(0.6)

InA = -1.17 + 0.5108

InA= -1.680

A = e-1.680

A= 1.037M

Therefore the concentration after 3minutes is 1.037M

6 0
3 years ago
Which of the following is a noble gas? carbon dioxide, boron, oxygen, and helium
sweet [91]
Carbon dioxide is a noble gas.
4 0
3 years ago
Read 2 more answers
If you know any answer to this pls help out I'll give brainiest plus a lot of points​
sukhopar [10]

Answer:

I cant see it clearly

Explanation:

:(

5 0
3 years ago
A single 250 gram
Gala2k [10]

2.2 x 10^-2

0.055 / 250 = 0.00022 - This would be 2.2 x 10^-4, but the question is asking for percent, not proportion, so multiply by 100% to get the percentage.

0.00022 * 100% = 0.022% = 2.2 * 10^-2

6 0
3 years ago
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