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3 years ago

Pleases helpp chemistry

Chemistry

1 answer:

White raven [17]3 years ago

4 0

7). -1
8). Six valence electrons.
9). 0-8

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How would you prepared pure water from the mixture of impure water? explain with experiment.

spayn [35]

Explanation:

Hello, there are alot method to separate the impurities from water. One of those & best method for purification of water is Distillation.

During distillation the given apparatus are set as shown in figure. After arrangement we put the impure water in distillation flask & there are two mouth of flask one is attached to condenser & other is covered. There are two tubes in the middle of the condenser in which water comes in from one and water goes out from the other and this happens continuously. The condenser is used to convert the collected water vapours into liquid water so that it can be collected easily in recieving flask.

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3 years ago

A mixture of CO (g) and excess O2(g) is placed in a 1.0 L reaction vessel at 100.0C and a total pressure of 1.50 atm. The CO is

umka2103 [35]

Answer:

Partial pressure of of CO₂ in the product mixture is 0,20atm

Explanation:

The balance equation is:

2CO(g) + O₂(g) → 2CO₂(g)

Total pressure of CO(g) and O₂(g) gases before reaction at 100,0°C and 1,0L is 1,50 atm. You can say:

X₁ + Y₁ = 1,50atm (1)

Where X₁ is initial partial pressure CO and Y₁ is initial partial pressure of O₂

After reaction partial pressures are:

X₂ = X₁ - 2n = 0; 2n = X₁

Y₂ = Y₁ - n

Z₂ = 2n

Where Z₂ is final partial pressure of CO₂

After reaction pressure at 100,0°C and 1,0L is 1,40 atm, that means:

1,40 atm = (Y₂ + Z₂)

1,40 atm = Y₁ - n + 2n

1,40atm = Y₁ + n

1,40 atm = Y₁ + X₁/2 (2)

Replacing (1) in (2)

1,40 atm = 1,50atm - X₁ + X₁/2

-0,10 atm = - X₁/2

0,20 atm = X₁.

As 2n = X₁; 2n = Z₂ = 0,20 atm

I hope it helps!

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3 years ago

Explain why unboiled water can be used to prepare an acetic acid solution, but not a naoh solution?

shtirl [24]

NaOH is a hygroscopic compound, which means that it has a very strong affinity for water. Moreover, NaOH is also a stronger base than acetic acid is a strong acid. These two properties of NaOH make it necessary for different precautions to be taken while preparing a solution.
On the other hand, acetic acid is not very reactive and may easily be prepared in a solution of unboiled water.

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