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Goshia [24]
3 years ago
6

I need help, lots of points to you, please give genuine answers, will mark brainliest.​

Chemistry
1 answer:
PSYCHO15rus [73]3 years ago
3 0

Answer:

this is hard

Explanation:

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Round each number to four significant figures
ira [324]

Answer:

a.

84,791 » 8479

b.

256.75 » 256.8

c.

431,801 » 4318

d.

0.00078100 » 0.0007810

Explanation:

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5 0
3 years ago
Find the [H+] in an acetic acid solution that has a pH of 5.12
Eva8 [605]
<span>Data:
pH = 5.2
[H+] = ?

Knowing that: (</span><span>Equation to find the pH of a solution)</span>
pH = -log[H+]
<span>
Solving:
</span>pH = -log[H+]
5.2 = - log [H+]
Knowing that the exponential is the opposite operation of the logarithm, then we have:
[H+] = 10^{-5.2}
\boxed{\boxed{[H+] = 6.30*10^{-6}}}\end{array}}\qquad\quad\checkmark
3 0
3 years ago
Which are examples of equilibrium? Check all that apply.
NeX [460]
The equilibrium means that amount that are coming equals the amount that are going.
So the correct answers are
<span>2. A person's income and expenses are equal every month.
</span><span>3. The pressure exerted on the inside of a balloon by the gas inside is equal to the pressure exerted on the outside of the balloon by the atmosphere.</span>
6 0
3 years ago
Read 2 more answers
Why is protein classified as a polymer?
Anika [276]
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3 0
3 years ago
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A public service announcement is created to encourage people to briefly stop using their wireless devices. Which justify the rea
geniusboy [140]

Answer:

A C D on edj

Explanation:

3 0
3 years ago
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