CHEMISTRY HIGH SCHOOL

For the reaction C5H5N(aq) + H2O(l) C5H5NH+(aq) + OH-(aq), which of the following is a conjugate acid-base pair? a. C5H5N, C5H5NH+
b. C5H5NH+, OH-
c. H2O, OH-
d. C5H5N, H2O

Answers

Answer 1
Answer: A conjugate acid results when a chemical species receives a hydrogen ion. Moreover, the conjugate base is what is formed after the conjugate acid has been formed. In this case, C5H5N accepts a hydrogen ion, becoming a conjugate acid and the species left over is OH-, making it the conjugate base. Therefore, the answer is B.
Answer 2
Answer:

Answer: b. C_5H_5NH^+, OH^-

Explanation:

According to the Bronsted-Lowry conjugate acid-base theory, an acid is defined as a substance which looses donates protons and thus forming conjugate base and a base is defined as a substance which accepts protons and thus forming conjugate acid.

For the given chemical equation:

C_5H_5N(aq.)+H_2O(l)\rightarrow C_5H_5NH^+(aq.)+OH^-(aq.)

Here, C_5H_5N is accepting a proton, thus it is considered as a base and after accepting a proton, it forms C_5H_5NH^+ which is a conjugate acid.

And, H_2O is losing a proton, thus it is considered as an acid and after loosing a proton, it forms OH^- which is a conjugate base.

Hence, the correct answer is b. C_5H_5NH^+, OH^-

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Discuss the relationship between the structure of hydrocarbons and their properties of polarity and solubility. How does this compare to water?

Answers

Answer:

Hydrocarbon being non polar are soluble only in non polar solvent.

Explanation:

Hydrocarbon molecules either have very little polarity or they do not have polarity at all, this is because of absence of electro-negative atoms in their molecular structure. Due to this their solubility is also affected. The solubility of a compound depends on its polarity as it can dissolve in a polar solvent only when it is polar or else they are soluble in non-polar solvent

The compound XCl is classified as ionic if X represents the element:

Answers

If the element is a metal with one electron in its outermost energy level.

For clouds to form, water vapor in the air must condense and change from a gas to a liquid. What must water molecules do as part of this process?A.
come close together and stick to each other
B.
escape into the surrounding air
C.
connect to each other in a rigid structure
D.
stop moving relative to each other

Answers

Answer:

come close together and stick to each other

Explanation:

The difference between three phases of a matter is the intermolecular interactions and thermal energy.

In case of gas, the intermolecular interactions are weak and thermal energy is high. So molecule move randomly, far from each other.

However in case of liquids the force of interactions are relatively stronger and the molecules are held together more effectively than gas.

Thus in order to condense a gas, we have to make the molecule come closer to each other so that they can be converted to liquid.

A.  

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**98 POINTS** Given 1.00 gram of (NH4)2 CO3, how many grams of this sample would be due to hydrogen?

Answers

OP already did it - CONGRATS!!

here are the steps 2 get the same ans:

(NH4)2 CO3 has 2x N, 8x H, 1x C and 3x O per molecule

so its molecular mass = 2x14 + 8x1 + 1x12 + 3x16

=28+8+12+48

=96g

of that 96g, 8x1=8g is due to Hydrogen

so by ratio n proportion, 1.00g will have 1x8/96 = 1/12g = 0.083g of H

What is the mass of 8.12 × 1023 molecules of CO2 gas? (Atomic mass of carbon = 12.011 u; oxygen = 15.999 u.)

Answers

Answer:

8306.76

Explanation:

you just calcuate 8.12 x 1023 and that will give you the answer

PLZ mark me as a BRAINLIEST

Which of the following compounds is least solublein water?
(1) copper (II) chloride
(2) aluminum acetate
(3) iron (III) hydroxide
(4) potassium sulfate

Answers

Iron (III) hydroxide is the least soluble compound as it has the lowest Ksp value.

What is solubility of a solute?

The solubility is the amount of solute that can dissolve in a given volume of solvent at a particular temperature.

The solubility of substances can be compared using their their solubility products constant (Ksp) values.

Iron (III) hydroxide has the lowest Ksp value.

Therefore, Iron (III) hydroxide is the least soluble compound.

Learn more about solubility at: brainly.com/question/24057916

#SPJ2

Answer:3

Explanation:

stated
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