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AfilCa [17]
3 years ago
7

Please do it correctly!

Chemistry
2 answers:
velikii [3]3 years ago
8 0

Answer:

how do

I recieve it then

shutvik [7]3 years ago
6 0

Explanation:

Check the comments section..thank you.

I tried putting it here but it was repeatedly deleted.

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4 Al + 3O2 → 2Al2O3 If 14.6 grams Al are reacted, how many liters of O2 at STP would be required?
melomori [17]

Answer: 9.08 L

Explanation:

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}\times{\text{Molar Mass}}    

\text{Moles of} Al=\frac{14.6g}{27g/mol}=0.54moles

4Al+3O_2\rightarrow 2Al_2O_3

According to stoichiometry :

4 moles of Al require  = 3 moles of O_2

Thus 0.54 moles of Al will require=\frac{3}{4}\times 0.54=0.405moles  of O_2

Standard condition of temperature (STP)  is 273 K and atmospheric pressure is 1 atm respectively.

According to the ideal gas equation:

PV=nRT

P = Pressure of the gas = 1 atm

V= Volume of the gas = ?

T= Temperature of the gas = 273 K      

R= Gas constant = 0.0821 atmL/K mol

n=  moles of gas= 0.405

V=\frac{nRT}{P}=\frac{0.405\times 0.0821\times 273}{1}=9.08L

Thus 9.08 L of O_2 at STP would be required

6 0
3 years ago
Fossil evidence sssssssssssssssssssssss
IRINA_888 [86]

Answer:

Fossils are essentially clues that have been left behind by various forms of living things. They are instrumental tools for understanding the diverse groups of organisms that have inhabited our planet at one time or another. A fossil is any preserved evidence of an organism.

i guess

Explanation:

5 0
3 years ago
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HELP QUICK PLEASE! GIVING 100 POINTS FOR FIRST RIGHT ANSWER
Vera_Pavlovna [14]

Answer:

16.5 kg

Explanation:

7 0
3 years ago
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Which of the following is not a characteristic of electromagnetic waves
Mekhanik [1.2K]

<u>Complete Question:</u>

Which of the following is not a characteristic of electromagnetic waves?

a. they can travel through a vacuum.

b. they can travel at various speeds through any one material.

c. they can be refracted.

d. they can be reflected.

<u>Correct Option:</u>

"They can travel at various speeds through any one material" is not a characteristic of electromagnetic waves.

<u>Explanation:</u>

It is a form of energy generated by interference from the oscillating magnetic and electric recorded. So we may conclude that it is created by moving electric charged particles through the vacuum so matter. This is a wave in which the two vectors vibrate each other perpendicularly and in the direction of the wave. Electromagnetic waves which involve gamma-rays, x-rays, ultraviolet rays, infrared-rays, microwaves and radio-waves can be featured by:

  • They may pass through the vacuum.
  • They are allowed to move through the matter and are reflectable.
  • They can pass through all of the material at the same pace. This means there is still constant speed of light, which is, they can be refracted.
7 0
3 years ago
Label the equivalence point on the graph of pH versus volume of the titration of a strong acid and strong base shown below
Lyrx [107]
For C, they would be the same. At the equivalence, you have equal moles of both the acid and the base.
4 0
3 years ago
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