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g100num [7]
2 years ago
10

Which buffer can be suitable to prepare a solution that needs to be buffered at ph 4?

Chemistry
1 answer:
zlopas [31]2 years ago
4 0

Answer:

For pH= 4.00 :

Add 0.1 ml of 0.1 molar NaOH to 50 ml of 0.1 molar potassium hydrogen phthalate .

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A sample of gas has a volume of 125mL at 6.0 atm pressure. What will the new volume in mL be of the pressure is decreased to 0.2
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A sample of helium gas has a volume of 620. Ml at a temp of 500 K. If we decrease the temperature to 100K while keeping the pres
Ne4ueva [31]

Answer:

A sample of helium gas has a volume of 620mL at a temperature of 500 K. If we ... to 100 K while keeping the pressure constant, what will the new volume be?

Explanation:

3 0
3 years ago
6) Mr. Collins finally decided to take this seriously and put both hands on the rope and applied a 500 N force to the left,
natali 33 [55]

Answer:

I'm pretty sure the net force is 200 N and the direction of motion is left

Explanation:

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5 0
3 years ago
Given the information that nitrogen atoms are larger than hydrogen atoms,which of the models best represent ammonia?(NH3)
Ray Of Light [21]

Answer:

<em>The correct option is the structure in the option D. </em>

Explanation:

Ammonia contains a single nitrogen atom bonded to three hydrogen atoms.

The structure present in option A shows a single nitrogen atom bonded with a single hydrogen atom hence it is not correct.

The structure in option B shows a nitrogen atom bonded to four hydrogen atoms hence it is also not correct.

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The structure in option D shows a nitrogen atom bonded to three hydrogen atoms which is the correct structure of ammonia (NH3).

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