1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
pshichka [43]
3 years ago
5

A quantity that had just a number

Chemistry
1 answer:
Mama L [17]3 years ago
4 0

Answer:

sa

Explanation:

You might be interested in
What is the median of the following set: 2, 4, 6, 8, and 10?
labwork [276]

Answer:9

Explanation:

(3+8+10+15)/4 = 36/4 = 9

6 0
3 years ago
After throwing the ball in the pool for my dog the ball sprung a leak and begin to fill with water. How many mL of water can th
ikadub [295]

Answer: i think 250ML

Explanation:

5 0
3 years ago
Calculate the pH and fraction of dissociation ( α ) for each of the acetic acid ( CH 3 COOH , p K a = 4.756 ) solutions. A 0.002
marysya [2.9K]

Answer:

The degree of dissociation of acetic acid is 0.08448.

The pH of the solution is 3.72.

Explanation:

The pK_a=4.756

The value of the dissociation constant = K_a

pK_a=-\log[K_a]

K_a=10^{-4.756}=1.754\times 10^{-5}

Initial concentration of the acetic acid = [HAc] =c = 0.00225

Degree of dissociation = α

HAc\rightleftharpoons H^++Ac^-

Initially

c

At equilibrium ;

(c-cα)                                cα        cα

The expression of dissociation constant is given as:

K_a=\frac{[H^+][Ac^-]}{[HAc]}

1.754\times 10^{-5}=\frac{c\times \alpha \times c\times \alpha}{(c-c\alpha)}

1.754\times 10^{-5}=\frac{c\alpha ^2}{(1-\alpha)}

1.754\times 10^{-5}=\frac{0.00225 \alpha ^2}{(1-\alpha)}

Solving for α:

α = 0.08448

The degree of dissociation of acetic acid is 0.08448.

[H^+]=c\alpha = 0.00225M\times 0.08448=0.0001901 M

The pH of the solution ;

pH=-\log[H^+]

=-\log[0.0001901 M]=3.72

3 0
3 years ago
A chemist is looking for an element that reacts similarly to the element lithium (LI). Which would be the best choice?
MatroZZZ [7]
Letter d, because they are both alkali metals (group one)
8 0
3 years ago
Read 2 more answers
What is the mass of a rectangular cube with dimensions of 3 cm x 2 cm x to 10 cm and a density of 10 g/cm^3
marta [7]

d=m/V so m=Vd

m=60cm^3 * 10g/cm^3=600g

3 0
3 years ago
Read 2 more answers
Other questions:
  • DesperateDesperateDesperateDesperateDesperateDesperateDesperate
    13·1 answer
  • Which of the following represents a chemical change. A water to boiled
    13·2 answers
  • Which of the following is not an example of kinetic energy? (2 points) Select one: a. mechanical energy b. nuclear energy c. ele
    7·2 answers
  • How many moles of chlorine gas is contained in 4.81x10^24 molecules
    8·1 answer
  • Temperature measures _____.
    14·2 answers
  • 8. In the nucleus, I tell cells what to do and how to change. 9. The fastest growing organ in humans is the​
    15·1 answer
  • Blast furnaces extract pure iron from the iron(III) oxide in iron ore in a two step sequence.In the first step, carbon and oxyge
    15·1 answer
  • Which of the following is not a diatomic molecule?
    6·1 answer
  • What is the least appropriate hypothesis for Eric to make?
    9·1 answer
  • Fill in the blank in order to complete the path for pollen as it fertilizes a plant:anther → stigma --> style → _____________
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!