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3 years ago

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What information does the atomic mass of an element provide? A. The number of isotopes B. The difference between the number of p

rotons and electrons C. The number of protons and neutrons in an atom D. The sum of electrons and protons in an atom

1 answer:

Ad libitum [116K]3 years ago

4 0

It provides the number of protons and neutrons in an atom.

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Please help i will give extra points

GREYUIT [131]

Answer:

B. Coal

Explanation: Coal is mined to produce energy.

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3 years ago

Three chemistry students measured the length of a copper bar. The recorded lengths were 5.05 cm, 5 cm , and 5.1 cm, What is the

Salsk061 [2.6K]

5.05 + 5 + 5.1 = 15.15cm Then you just divide it by the amount of measurements you had like this:15.15 ÷ 3 = 5.04999971cm Then you can just round it to the 3rd figure: 5.05cm < And that's the mean/average length of the bar. :) (Or the one above if you want all of the decimals too)

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4 years ago

Please help. I will post another sheet because I need help, thanks!

Sliva [168]

The last one will be It's better to use the average data instead of the single trail because the average you don't have to multiply add subtract and all that nonsense but if you use the single trail you will have to do all the adding multiplying etc.

8 0

4 years ago

What part of a refracting telescope would you measure to find the aperture? *

andrezito [222]

Answer:

Objective

Optics

For an optical instrument, the aperture is the diameter of the objective lens (refracting telescope) or the primary mirror (reflecting telescope). The larger the aperture, the more light the telescope can gather, and the fainter the limiting magnitude of the instrument.

Explanation:

6 0

3 years ago

Read 2 more answers

K3PO4+AgNO3--> ???<br> Ba(HCO3)2+Ba(OH2)-->

GuDViN [60]

<u>Explanation:</u>

A balanced chemical equation is one where all the individual atoms are equal on both sides of the reaction. It follows the law of conservation of mass.

<u>For 1:</u>

When potassium phosphate reacts with silver nitrate, it leads to the formation of silver phosphate and potassium nitrate.

The balanced chemical equation follows:

$3AgNO_3+K_3PO_4\rightarrow Ag_3PO_4+3KNO_3$

<u>For 2:</u>

When barium bicarbonate reacts with calcium hydroxide, it leads to the formation of barium carbonate, calcium carbonate and water

The balanced chemical equation follows:

$Ba(HCO_3)_2+Ca(OH)_2\rightarrow BaCO_3+CaCO_3+2H_2O$

5 0

3 years ago