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jek_recluse [69]
3 years ago
10

What does an atomic number represent in an atom?

Chemistry
1 answer:
vazorg [7]3 years ago
3 0

Answer:

C, number of protons and neutrons

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sp2606 [1]

Answer:

Whenever a force is applied to an object, causing the object to move, work is done by the force. ... Work can be either positive or negative: if the force has a component in the same direction as the displacement of the object, the force is doing positive work

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3 years ago
What is the pH difference of two samples if the concentration of [H+] ions is 1000-fold less in the second sample?
snow_tiger [21]
The correct answer is a. This is because the pH of a solution is defined as -log10(concentration of H+ ions). An inverse logarithmic scale such as this means that a solution with a lower concentration of H+ ions will have a higher pH than one with a higher concentration. Therefore we know that the pH of the second sample will be higher than the first.

Since the logarithmic scale has the base 10, a change by 1 on the scale is a consequence of multiplication/division of the H+ concentration by a factor of 10. As the scale is inverse, this means that a decrease of concentration by factor 1000 is equivalent to increasing the pH by (1000/10) = 3.
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3 years ago
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Please hurry Participants in an informal discussion would most likely
Katyanochek1 [597]
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3 years ago
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50.0 grams of KCl is dissolved in water to make a 4.00 L
xeze [42]

Answer:0.1677M

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Once you get the number of moles, you apply it to the molarity formula.

8 0
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Analyze how friction can be both a positive and negative aspect in our everyday lives. Use examples to support your statements.
3241004551 [841]

Answer:

For example, friction between our shoes and the floor stop us from slipping and friction between tyres and the road stop cars from skidding. Friction is sometimes unhelpful. For example, if you don't lubricate your bike regularly with oil, the friction in the chain and axles increases.

Explanation:

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