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3 years ago

Alcohol and water have different melting points. which method would you use to separate them?

1 answer:

4 0

The process of separating alcohol from water can be done in several different ways. The most familiar method is through heating the blended liquid. Since alcohol has a lower boiling temperature than water, it will rapidly become steam. It can then be condensed into a separate container. You can also freeze the alcoholic mixture, which allows for partial removal of the nonalcoholic components; what remains will be more rich in alcohol. Use ordinary table salt to separate isopropyl alcohol from water. The result will be a condensed isopropyl alcohol, not a drinking alcohol.

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In this complete ionic equation of a double replacement reaction, circle the spectator ions

Dvinal [7]

Answer:

CO3-+2H----->H2O+CO2

Explanation:

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3 years ago

Can I get some help

horrorfan [7]

Answer:

I'm afraid not, the image is too blurry

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3 years ago

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If 6.5 mol NO2 react with 1.0 mol H20, how many moles of the excess reactant

harkovskaia [24]

Answer:

3.5 moles of NO2.

Explanation:

The balanced equation for the reaction is given below:

3NO2 + H2O —> NO + 2HNO3

Next, we shall determine the excess reactant. This is illustrated below:

From the balanced equation above,

3 moles of NO2 reacted with 1 moles H2O.

Therefore, 6.5 moles of NO2 will react with = (6.5 x 1)/3 = 2.17 moles of H2O.

From the above calculations, we can see that it will take a higher amount i.e 2.17 moles than what was given i.e 1 mole of H2O to react completely with 6.5 moles of NO2.

Therefore, NO2 is the excess reactant and H2O is the limiting reactant.

Next, we shall determine the number of mole of the excess reactant that reacted in the reaction. This is illustrated below:

From the balanced equation above, we can see that 3 moles of NO2 reacted with 1 mole of H2O.

Finally, we shall determine the leftover mole of the excess reactant after the reaction. This is illustrated below:

Given mole of NO2 = 6.5 moles

Reacted mole of NO2 = 3 moles

Leftover mole of NO2 =...?

Leftover mole = Given mole – Reacted mole

Leftover mole of NO2 = 6.5 – 3

Leftover mole of NO2 = 3.5 moles.

Therefore, 3.5 moles of NO2 remained after the reaction.

3 0

4 years ago

a spherical sample has a mass of 2.813g. it has a diameter of 8.0mm. what is the sphere made of (determined by its density as g/

blondinia [14]

To determine the density, we use the following formula:

$density= \frac{mass}{volume}$

mass= 2.813 grams
volume= ?

we need to first calculate the volume before we can solve for the density. since the question states that the sample has a spherical shape, we can use the volume formula of spheres to find it.

$Sphere_{volume}= \frac{4}{3} \pi r^{3}$

radius (r)= $\frac{diameter}{2}$ = $\frac{8.0 mm}{2} = 4.0 mm$

let's plug in the values

V= $\frac{4}{3} \pi 4^{3} = 268 mm^3$

we need to change the $mm^3$ to $cm^3$ using the following conversion

1 cm= 10 mm
$268 mm^3 (\frac{1 cm}{10 mm} )^3 = 0.268 cm^3$

now we can find the density.

density= 2.813 grams/ 0.268 cm= 10.5 g/cm3

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3 years ago

The diagram below shows some subatomic particles. A diagram similar to a flowchart starts with a circle labeled Atom. From there

Aleksandr-060686 [28]

Answer:

The shaded area 2 is likely to have subatomic particle that are constantly in motion. I took the test and I got it right

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