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3 years ago

If the pH is 9, what is the concentration of hydroxide ion? Is this solution

Chemistry

1 answer:

kogti [31]3 years ago

8 0

Answer:

hydrogen peroxide in my place and don't have time And the Base and don't think I will have a clue

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Carbon can react with oxygen to form carbon dioxide. Which of the following statements about this chemical change is true?

wlad13 [49]

Carbon can react with oxygen to form carbon dioxide. Which of the following statements about this chemical change is true? ... Carbon and oxygen atoms are destroyed as new atoms are formed. Carbon and oxygen atoms have the same properties as molecules of carbon dioxide.

6 0

3 years ago

In an electron dot diagram what is the maximum number of dot surrounding a symbol. A. 8 B.4 C. 2 D.10

Ksju [112]

Answer:

A. 8

Explanation:

8 valence electrons means you have a full shell.

4 0

3 years ago

THIS IS FOR MY FINAL EXAM IN CHEM!!!!!! PLEASE PLEASE PLEASE DON'T GUESS

Artemon [7]

A. soluble.
The are solubility rules that predict precipitation reaction.

7 0

3 years ago

Explain the energy flowing as you hold an ice cream cone. (Be sure to mention "the system," "the surroundings," and how energy i

Serggg [28]

Answer:

This is what I put, it hasn't been graded though...

Within the system, the energy is flowing from your hand to the ice cream cone. Energy is also flowing from the surroundings to the ice cream cone unless it's reeeeaally cold in the surroundings in which case why are you even holding an ice cream cone when it's that cold?

4 0

3 years ago

Biphenyl, C12H10,C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6.C6H6. At 25 ∘C,25 ∘C, the vapor p

cestrela7 [59]

Answer:

Vapour pressure of solution is 78.151 torr

Explanation:

Molar mass of biphenyl = 154.21 g

Molar mass of benzene = 78.11 g

19.2 g biphenyl = (19.2/154.21) moles of biphenyl = 0.125 moles of biphenyl

33.7 g of benzene = (33.7/78.11) moles of benzene = 0.431 moles of benzene

Total number of moles = (0.125+0.431) moles = 0.556 moles

Mole fraction of benzene in solution = (0.431/0.556) = 0.775

According to Roults law, vapour pressure of solution made from non-volatile solute = $(mole fraction of solvent in solution)\times (vapour pressure of pure solvent)$

Here solute is biphenyl and solvent is benzene

So, vapour pressure of solution = $(0.775\times 100.84)torr$ = 78.151 torr

8 0

2 years ago