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Amanda [17]
4 years ago
9

What formula can be used to calculate [H30+]

Chemistry
1 answer:
Yuliya22 [10]4 years ago
4 0
[H3O+] is just the same with [H+]. There are quite a few relationships between [H+] and [OH−] ions. And because there is a large range of number between 10 to 10-15 M, the pH is used. pH = -log[H+] and pOH = -log[OH−]. In aqueous solutions, [H+ ][OH- ] = 10-14
Read more on Brainly.com - brainly.com/question/1365379#readmore
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Chemical reactions that release energy are called Question 1 options:
kolbaska11 [484]

Answer:

Exothermic Reactions.

Explanation:

Reactions that release energy are called exothermic reactions.

Whereas that absorb energy are called Endothermic reactions.

More energy is being released to the surroundings than was absorbed to initiate and maintain the reaction in case of exothermic reactions.

Burning of a candle is an exothermic reaction.

4 0
3 years ago
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How many moles are in 1.9 x 1046 atoms of chromium?
faust18 [17]

Answer:

<h2>3.156 × 10²² atoms</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{1.9 \times  {10}^{46} }{6.02 \times  {10}^{23} }  \\  = 3.156 \times  {10}^{22}

We have the final answer as

<h3>3.156 × 10²² atoms</h3>

Hope this helps you

8 0
3 years ago
what is the relationship between the scale divisions marked on the graduated cylinders and the estimated uncertainty in the volu
AURORKA [14]

Answer:

  • <em>The relationship between the scale divisions marked on the graduated cylinders and the estimated uncertainty in the volume measurements is</em> that <u>the larger the divisions the larger the uncertainty, and the smaller the divisions the smaller the uncertaintity.</u>

Explanation:

In general, <em>graduated cylinders</em> are marked with divisions (lines) at equal spaces or intervals. There are divisions that show the measure with a number and a series of intermediate not numbered divisions in between two numbered lines.

The <em>uncertainty </em>of the instrument is determined as half the difference between two consecutive marks.

So, the larger the interval of two consecutive marks the larger the uncertainty.

The attached image, taken from brainly.com/question/13102373, shows you some marks in a graduated cylinder.

7 0
3 years ago
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Answer: I believe/don't believe hummingbirds are attracted to the color red because ... (Enter your reasons)

Explanation:

Hypothesis are always different, up to you to choose believe or not believe depending on your position.

:) Hope this helped.

8 0
3 years ago
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Hunter-Best [27]

Answer:

1

Explanation:

your can only test one thing at a time

5 0
3 years ago
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