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Natali [406]
2 years ago
9

BALANCING CHEMICAL EQUATIONS WORKSHEET

Chemistry
1 answer:
kherson [118]2 years ago
4 0

Answer:

Put that in y butt ps

Explanation:

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The answer is A, good luck
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Which of the following best describes 'cold energy’?
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la vaina esa es de la A no le pare loco

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Suppose that 6.2 mL of 2.1 M KOH(aq) is transferred to a 250 mL volumetric flask and diluted to the mark. It was found that 36.9
galina1969 [7]

Answer:

0.928 M

Explanation:

The concentration of acid can be determined by using the volume used and the concentration and volume used of base.

We will use the law of equivalence of moles.

M₁V₁=M₂V₂

M₁ = concentration of base used

V₁ = volume of base used

M₂ = concentration of acid used =? (to be determined)

V₂ = volume of acid used

The initial concentration of KOH used is diluted so let us find the final concentration of KOH after dilution

initial moles = final moles

initial concentration X initial volume = final concentration X final volume

6.2 X 2.1 = 250 X final concentration

final concentration = 0.052 M = M₁

V₁ = 36.9 mL

V₂ = 6.2 mL

Here with each mole of phosphoric acid three moles of KOH are used.

Therefore

3 M₁V₁ = M₂V₂

M₂ = \frac{V_{2}}{3M_{1}V_{1}}=0.928M

3 0
3 years ago
What state of matter can be compressed? gases solids, liquids, and gases solids liquids 0 fin​
Nuetrik [128]

Answer:gasses

Explanation:

3 0
3 years ago
The pH of milk is 6.0 while the pH of lemon juice is 2.0. Which of the following
Reptile [31]

Answer:

Option (d) The milk is 10000 times more basic than the lemon juice.

Explanation:

The following data were obtained from the question:

pH of milk = 6

pH of lemon juice = 2

To know which option is correct, let us find the ratio of the concentration of Hydrogen ion, H+ of the the milk to that of the lemon.

This is illustrated below:

For milk:

pH = 6

Hydrogen ion concentration, [H+] =?

pH = –Log [H+]

6 = –Log [H+]

– 6 = Log [H+]

[H+] = Antilog (– 6)

[H+] = 1x10^-6 M

For lemon juice:

This is illustrated below

pH = 2

Hydrogen ion concentration, [H+] =?

pH = –Log [H+]

2 = –Log [H+]

– 2 = Log [H+]

[H+] = Antilog (– 2)

[H+] = 0.01 M

Next we shall determine the ratio of the concentration of Hydrogen ion, [H+] of milk to that of the lemon juice. This is illustrated below:

[H+] of milk : [H+] of lemon juice

[H+] of milk / [H+] of lemon juice

=> 1x10^-6 / 0.01

=> 1 / 10000

[H+] of milk : [H+] of lemon juice

=> 1 : 10000

Note: the higher the hydrogen ion concentration, [H+], the more acidic the substance will be and the lesser the hydrogen ion concentration, [H+], the more basic the substance will be.

From the above illustration, we can see that the milk is 10000 times more basic than the lemon juice..

4 0
3 years ago
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