What is the hydronium ion concentration of a solution whose pH is 12.40?

Answers

Answer 1

Answer: Hydronium ion concentration = 3.98×10-13

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I Need Help With These.

Answers

You have to use the equation P₁V₁=P₂V₂ for the first 2 questions and V₁/T₁=V₂/T₂ for the third one.

1) Since you have to find the final volume you have to solve the equation above for V₂ to get V₂=P₁V₁/P₂
P₁=1atm
V₁=2.00L
P₂=6x10^4atm
when you plug everything in you should get 3.33x10^-5 L

2) You are again trying to find V₂ so use the equation V₂=P₁V₁/P₂
P₁=1.2atm
V₁=15000L
P₂=250atm
when you plug everything in you should get 72L

3) we are trying to find the final volume so use the equation V₂=V₁T₂/T₁
V₁=2.2L
T₁=14.2°C (convert this into 287.2K since most gas law equations require the use of kelvin)
T₂=38.98°C (tern this to 311.98K for the same reason as above)
when you plug everything in you should get 2.39L

I hope this helps. Let me know in the comments if anything if anything is unclear.

The water in a 150-mL flask is poured into a beaker that contains 600 mL of ethyl alcohol. Which substance is the solvent in this mixture?

Answers

Answer:

Ethyl alcohol is a solvent on the mixture.

Explanation:

Solution: It is a mixture of liquid in which solute (minor component) is distributed uniformly in a solvent (major component).

In a solution, mass of solute is always less than the mass of solvent.

Mass of water = 150 mL

Mass of ethyl alcohol = 600 mL

Mass of water < Mass of ethyl alcohol

Ethyl alcohol is a solvent on the mixture.

The solvent in the mixture is the ethyl alcohol assuming that the ethyl alcohol is not very dilute. The amount of the solvent must be greater than the amount of the solute. If the ethyl alcohol is dilute such that the resulting solution will have more water than pure ethyl alcohol, the solvent is water and the solute is ethyl alcohol.

Which material is not a form of pyroclastic material?A- volcanic dust
B- volcanic dirt
C- volcanic bombs
D- lapilli

Answers

I believe it's B. By volcanic dust do you mean ash?

When the pH of a solution changes from a pH of 5 to a pH of 3, the hydronium ion concentration isA. 0.01 of the original content
B. 0.1 of the original content
C. 10 times the original content
D. 100 times the original content

Answers

Answer : The correct option is, (D) 100 times the original content.

Explanation :

As we are given the pH of the solution change. Now we have to calculate the ratio of the hydronium ion concentration at pH = 5 and pH = 3

As we know that,

$pH=-\log [H_3O^+]$

The hydronium ion concentration at pH = 5.

$5=-\log [H_3O^+]$

$[H_3O^+]=1* 10^(-5)M$ ..............(1)

The hydronium ion concentration at pH = 3.

$3=-\log [H_3O^+]$

$[H_3O^+]=1* 10^(-3)M$ ................(2)

By dividing the equation 1 and 2 we get the ratio of the hydronium ion concentration.

$([H_3O^+]_(original))/([H_3O^+]_(final))=(1* 10^(-5))/(1* 10^(-3))=(1)/(100)$

$100* [H_3O^+]_(original)=[H_3O^+]_(final)$

From this we conclude that when the pH of a solution changes from a pH of 5 to a pH of 3, the hydronium ion concentration is 100 times the original content.

Hence, the correct option is, (D) 100 times the original content.

pH = -log( [H3O+] )
so the pH is in powers of 10
1* 10^ 5 / 1*10^3 = 1* 10^2 = 100
so the answer is:
D. 100 times the original content

The _____ rate is the number of particles that react in a given time to form products. a. le chantelier
b. reaction
c. dynamic
d. elementary

Answers

b. reaction rate is the answer

The correct ANWSER is b Mark me the brainliest anwser

While camping up at Haloooo Mountain (5,500 feet above sea level), it generally takes Sandy about the same amount of time to boil water for her soup as it takes to make a sandwich. This week, Sandy is camping at a trail that is only about 200 feet above sea level. Sandy is very hungry and wants something to eat immediately. Should she make the soup or sandwich? Which would be ready more quickly and why?

Answers

She should make soup. When you are way above sea level, the atmospheric pressure decreases. Boiling starts when the vapor pressure of the liquid is the same with the atmospheric pressure. This would mean that water boils at a much lower temperature than the usual 100deg C. So it would take longer for the components in the soup to cook compared to when it is cooked on the foot of the mountain.

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