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3 years ago

Can someone please do this for me

Chemistry

1 answer:

QveST [7]3 years ago

7 0

Hello! I can help you with this! Here are the answers that work for each sentence:

1. chemistry
2. matter
3. substance
4. physical
5. chemical
6. elements
7. compound
8. mixture
9. heterogeneous
10. homogeneous
11. atom
12. chemical bond
13. molecule

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What element is being oxidized<br><br> Fe2O3 + 3CO -> 2FE +3C02

Vinvika [58]

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3 years ago

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The answer is B.Let it sit

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A beam of light passes though a liquid in a test tube without scattering. Which type of mixture is most likely in the test tube?

butalik [34]

The answer would be letter C - solution.

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A 46.9 gram sample of a substance has a volume of about 3.5 centimeters3. It is solid at a room temperature of 23ºC. Out of the

horrorfan [7]

Answer : (C) Hafnium is the most likely identity of the given substance.

Solution : Given,

Mass of given substance (m) = 46.9 g

Volume of given substance (V) = 3.5 $Cm^{3}$

First, find the Density of given substance.

Formula used :

$Density=\frac{\text{Mass of given substance}}{\text{Voume of given substance}}$

Now,put all the values in this formula, we get

$Density=\frac{46.9 g}{3.5 Cm^{3} }$ = 13.4 g/ $Cm^{3}$

So, we conclude that the density of given substance (13.4 g/ $Cm^{3}$ ) is approximately equal to the density of Mercury and Hafnium (13.53 and 13.31 g/ $Cm^{3}$ respectively).

According to the question the substance is solid at room temperature but Mercury is liquid at room temperature. So, Mercury is not identical to the given substance.

Another element i.e, Hafnium is the element whose density is approximately equal to the given substance and also solid at room temperature. And we know that the melting point of solid is high.

So, Hafnium is the most likely element which is the identity of the given substance.

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3 years ago

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WILL GIVE BRAINLIEST!

Oliga [24]

Answer:

Explanation:

Increasing the the temperature would favour the endothermic reaction which is the forward direction however increasing the pressure would make the reaction try to counteract this change by favouring the reaction that would create more products so the equilibrium will shift left instead of right.

Hope this helps.

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2 years ago