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Leona [35]
3 years ago
6

A student predicts that a solution of ethanol (C2H5OH) and water will have a lower density at room temperature than that of pure

water. Which tools would most help the student test this prediction?
Will give brainly
Chemistry
2 answers:
ohaa [14]3 years ago
4 0

Answer:

It would probably be, something that can take up moisture to test it.

Explanation:

(to see if it can evaporate)

Lubov Fominskaja [6]3 years ago
3 0
It could probably be something that could take moisture to test it
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jim jill robert and kim each run paper chromatography on an unknown aqueous mixture. Jim gets a red band jill gets a yellow band
Morgarella [4.7K]
Chromatography is an analytical method of separating components of the mixture. Particularly, this method uses the paper chromatography. The color indicates the type of substance existing. Each substance is designated to one color only. So, if your paper showed more than one color, it mean that there is more than one component in there. Therefore, Kim's specimen contains more than one component because of the red and blue band.
4 0
4 years ago
A box contains 104 gas molecules, 2500 of nitrogen and 7500 of argon in thermal equilibrium. The molecular weight of N2 is 28g/m
LekaFEV [45]

Answer : The temperature of this gas will be, 206.9 K

Explanation :

The expression for the kinetic energy per molecule of monoatomic gas (argon) is:

K.E_{argon}=n_{argon}\times \frac{3}{2}\times K_BT      ...........(1)

The expression for the kinetic energy per molecule of diatomic gas (nitrogen gas) is:

K.E_{nitrogen}=n_{nitrogen}\times \frac{5}{2}\times K_BT      .............(2)

The total kinetic energy of the molecule will be,

K.E_{Total}=K.E_{argon}+K.E_{nitrogen}

Now put all the expression in this, we get:

K.E_{Total}=(7500)\times \frac{3}{2}\times K_BT+(2500)\times \frac{5}{2}\times K_BT

T=\frac{K.E}{17500\times K_B}

Now put all the given values in this expression, we get:

T=\frac{5\times 10^{-17}J}{17500\times (1.381\times 10^{-23}J/K)}

T=206.9K

Therefore, the temperature of this gas will be, 206.9 K

8 0
4 years ago
Studying and got stuck if someone can help me.
Lostsunrise [7]

Answer:

Ph level 0-7 is a acid

ph level 7-14 is base

bases turn paper blue

acids dissolve metal

acids contain hydrogen ions

Explanation:

I dont know the last one all I know that they become neutral when acids and bases are mixed.

3 0
3 years ago
The breaking down and changing of rocks at or near Earth's surface is called _____.
vodomira [7]
The answer is weathering
6 0
3 years ago
Read 2 more answers
The gene for tallness (T) in a pea plant is dominant over the gene for shortness (t).
astra-53 [7]

Answer:

C. 75%

Explanation:

From a heterozygous cross (Tt x Tt) the produced offspring would consist of:

  • 25% TT -it would be tall-.
  • 50% Tt -it would be tall as the gene T is dominant-.
  • 25% tt -it would not be tall-.

Thus the produced offspring that would be tall is (50% + 25%) 75%. The answer is option C.

6 0
3 years ago
Read 2 more answers
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