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garri49 [273]
3 years ago
6

A- is a weak base. which equilibrium corresponds to the equilibrium constant ka for ha?

Chemistry
1 answer:
vekshin13 years ago
5 0

Answer:

K_a=\frac{[H^+][A^-]}{[HA]}

Explanation:

ka is defined as the dissociation constant of an acid. It is defined as the ratio of concentration of products to the concentration of reactants.

For the dissociation of weak acid, the chemical equation follows:

HA\rightleftharpoons H^++A^-

The equilibrium constant is defined by the equilibrium concentration of products over reactants:

K_a=\frac{[H^+][A^-]}{[HA]}

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Cold Packs

<u>Explanation:</u>

Endothermic reactions are reactions in which heat is absorbed from the surroundings and the container in which the reaction takes place is said to be very cold. In cold packs, ammonium nitrate is used, is dissolved in solution is said to be an example of endothermic reaction, in this the heat energy is absorbed from the surroundings. In this the solute increases the solubility with the rise in temperature, and also used in cold packs.

3 0
3 years ago
A hot cup of coffee (treat it like water) rests on a windowsill. If it cools off from 90 C
kakasveta [241]

Answer:

1721.8ml

Explanation:

90-30=60

103,310÷60=1721.83333333

1721.83333333= 1721.8

5 0
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What causes eclipses? select three options
arlik [135]

Answer:

The first, second, and 4th option

Explanation:

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3 years ago
A flask that weighs 345.8 g is filled with 225 mL of carbon tetrachloride. The weight of the flask and carbon tetrachloride is f
nikdorinn [45]

The density of carbon tetrachloride, given the data is 1.59 g/mL

<h3>What is density? </h3>

The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as

Density = mass / volume

with the above formula, we can determine the density of carbon tetrachloride. Details below:

<h3>How to determine the density of carbon tetrachloride</h3>

The following data were obtained from the question:

  • Mass of flask = 345.8 g
  • Mass of flask + carbon tetrachloride = 703.55 g
  • Mass of carbon tetrachlorcide = 703.55 - 345.8 = 357.75 g
  • Volume of carbon tetrachlorcide = 225 mL
  • Density of carbon tetrachlorcide =?

Density = mass / volume

Density of carbon tetrachlorcide = 357.75 / 225

Density of carbon tetrachlorcide = 1.59 g/mL

Learn more about density:

brainly.com/question/952755

#SPJ1

7 0
1 year ago
Somebody help pleaseeee!!!
Anika [276]

Sodium Oxide ---> Na2O

Calcium Chloride ---> CaCl2

Potassium Sulfide ---> K2S.

I hope this helps! :)

8 0
2 years ago
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