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2 years ago

1.00 mole of O2 contains the same number of oxygen atoms as?

Chemistry

1 answer:

Sergio [31]2 years ago

5 0

Answer:

1.00mole of CH3CO2H

Explanation:

1mole of O2mole =26.022*10^23 atoms

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Each chemical element has an atomic number and a mass number. the atomic number refers to the number of ___________________the e

creativ13 [48]

The atomic number tells us the number of protons and electrons.
The atomic mass tells us the weight of the nucleus, which is the amount of protons and neutrons

5 0

3 years ago

5.2 X 1026 molecules of CH4

olya-2409 [2.1K]

<h3 /><h3>Answer above </h3>

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8 0

3 years ago

What is chromatography. also give some applications from normal life.

12345 [234]

Answer:

Explanation:

Chromatography is a technique for the separation of a mixture by passing it in solution or suspension through a medium in which the components move at different rates.Chromatography is also used to help catch criminals.Spoilage detection. Chromatography can be used in flavor studies and to detect spoilage in foods. Used in additive detection and used in determining nutritional quality.

6 0

3 years ago

What are the primary chemical components present in a phosphate buffer at ph 7.4? H3po4 and po43–?

fenix001 [56]

Answer :

The correct answer for primary component of phosphate buffer at pH = 7.4 is H₂PO₄⁻ and HPO₄²⁻ .

Buffer solution :

It is a solution of mixture of weak acid and its conjugate base OR weak base and its conjugate acid . It resist any change in solution when small amount of strong acid or base is added .

Capacity of a good buffer :

A good buffer is identified when pH = pKa .

From Hasselbalch - Henderson equation which is as follows :

$pH = pka + log \frac{[A^-]}{[HA]}$

If [A⁻] = [HA] ,

pH = pka + log 1

pH = pKa

This determines that if concentration of weak acid and its conjugate base are changed in small quantity , the capacity of buffer to maintain a constant pH is greatest at pka . If the amount of [A⁻] or [HA] is changed in large amount , the log value deviates more than +/- 1M and hence pH .

Hence Buffer has best capacity at pH = pka .

Phosphate Buffer :

Phosphate may have three types of acid-base pairs at different pka ( shown in image ).

Since the question is asking the pH = 7.4

At pH = 7.4 , the best phosphate buffer will have pka near to 7.4 .

If image is checked the acid - base pair " H₂PO₄⁻ and HPO₄²⁻ has pka 7.2 which is near to pH = 7.4 .

Hence we can say , the primary chemical component of phosphate buffer at pH = 7.4 is H₂PO₄⁻ and HPO₄²⁻ .

8 0

3 years ago

A swimming pool is 5.0 m long, 4.0 m wide and 3.0 m deep. Compute the force exerted by the water against

Alona [7]

For the answer to the question above, ater weights 1000kg per meter cubed. the volume of the pool is part A is 5*4*3 = 60 meters cubed 
60*1000 = 60 000kg. the force from this is m*g = 60 000 * 9.81 = 588kN 

part B: 
volume: 4*4*3 = 48 meters cubed 
48 * 1000 = 48000kg 
F = 9.81*48000 = 470kN
I hope this helps.

6 0

3 years ago