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3 years ago

If an atom has 17 protons, 15 neutrons, and 20 electrons, what is the atom's electrical charge?

1 answer:

3 0

The overall charge on this ion is -3. Neutrons don’t carry a charge, while protons and electrons carry a net +1 and -1 charge, respectively. In this case, the electrons outweigh the protons by 3, making the overall charge -3.

Hope this helps!

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Calculate the number of moles in the 2.1-L volume of air in the lungs of the average person. Note that the air is at 37.0ºC (bod

adelina 88 [10]

Answer: 0.0826mol

PV=nRT
n=PV/RT
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3 years ago

If drops of water are subdivided to the ultimately smallest drops possible, what is the smallest particle of water that retains

vlabodo [156]

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2 years ago

What is the molarity of a solution of 14.0 g NH4Br in enough H2O to make 150 mL of solution?

kiruha [24]

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3 years ago

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`You have to be careful about pouring drano down your pipes since it is mainly hydrochloric acid--you can't do it if they are ma

Zanzabum

Answer:

6.67 moles

Explanation:

Given that:-

Moles of hydrogen gas produced = 10.0 moles

According the reaction shown below:-

$2Al + 6HCl\rightarrow 2AlCl_3 +3H_2$

3 moles of hydrogen gas are produced when 2 moles of aluminium undergoes reaction.

Also,

1 mole of hydrogen gas are produced when $\frac{2}{3}$ moles of aluminium undergoes reaction.

So,

10.0 moles of hydrogen gas are produced when $\frac{2}{3}\times 10.0$ moles of aluminium undergoes reaction.

<u>Moles of Al needed = $\frac{2}{3}\times 10.0$ moles = 6.67 moles</u>

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3 years ago

Why are isotopes with short half-lives not useful for dating very old rocks?

erma4kov [3.2K]

Answer:

The radioactive isotopes within these brains typically record the ages of the grains-not the time when the sedimentary rock was formed, making it difficult to date using radiometric dating. The half-life of U-235 is 704 million years.

Explanation:

hope this helps but if i'm wrong then i'm sorry..

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2 years ago

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