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3 years ago

Determine the number of molecules present in 4.56 moles of nitrogen (n2).

1 answer:

4 0

To calculate the number of molecules, we can simply use this rule:
number of molecules = number of moles x Avogadro's number

In this problem, we have:
number of moles = 4.56 moles
Avogadro's number is a constant = 6.02 x 10^23

Substituting in the above equation, we can calculate the number of molecules as follows:
number of molecules = 4.56 x 6.02 x 10^23
= 2.74512 x 10^24 molecules

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When two your substances are combined so that each of the pure substances retains its own properties the result is a(n)?A. mixtu

goblinko [34]

Mixture is the answer

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3 years ago

Chlorine is used to disinfect swimming pools. the accepted concentration for this purpose is 1.00 ppm chlorine, or 1.00 g of chl

frez [133]

The accepted concentration of chlorine is 1.00 ppm that is 1 gram of chlorine per million of water.

The volume of water is $2.29\times 10^{4} gal$ .

Since, 1 gal= 3785.41 mL

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Density of water is 1 g/mL thus, mass of water will be $8.66\times 10^{7}g$ .

Since, 1 grams of chlorine → $10^{6}$ grams of water.

1 g of water → $10^{-6}$ g of chlorine and,

$8.66\times 10^{7}g$ of water →86.6 g of chlorine

Since, the solution is 9% chlorine by mass, the volume of solution will be:

$V=\frac{100}{9}\times 86.6 mL=9.62\times 10^{2} mL$

Thus, volume of chlorine solution is 9.62\times 10^{2} mL.

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3 years ago

The following reaction is a _______ reaction.

jasenka [17]

Compound reaction :)

7 0

3 years ago

If a plane travels at a speed of 600 km/h, how long<br> would it take to travel a distance of 300 km

iogann1982 [59]

Answer:

30 minutes

Explanation:

If the plane is going 600 km/h

divide the length and time and it would be half of that, so 300 km would take 30 mins.

4 0

3 years ago

Read 2 more answers

Which of the answer choices best describes elements?

lianna [129]

It can be a compound or a single element. An element is a pure substance that cannot be separated into simpler substances by chemical or physical means. There are about 117 elements, butcarbon, hydrogen, nitrogen and oxygen are only a few that make up the largest portion of Earth.

I would say d.

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3 years ago