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
Novay_Z [31]
3 years ago
6

Select all the discoveries that J. J. Thomson is credited with making.

Chemistry
2 answers:
goblinko [34]3 years ago
6 0
<span>subatomic particles neutrons isotopes electrons protons. subatomic particles isotopes electrons.</span>
tia_tia [17]3 years ago
4 0
Subatomic particles, isotopes, and electrons hope this helps and have a great Christmas.
You might be interested in
What would happen if grasshoppers population increased
hram777 [196]
Their prey would decrease
4 0
3 years ago
PLEASE HELP!!!! i give a lot of points
hammer [34]
spdcowihdej 1
aodnwofrh 2
sixj3
dosprwpr3
5 0
2 years ago
PLEASE HELP ME!!!
ohaa [14]

Answer:

1045

Answer: 1045 J of energy was released on cooling the down the water from 20 °C to 10 °C.

4 0
3 years ago
Read 2 more answers
Sodium thiosulfate, Na 2S 2O 3, is used as a "fixer" in black and white photography. Identify the reducing agent in the reaction
Tatiana [17]

Answer: Reducing agent in the given reaction is S_{2}O^{2-}_{3}.

Explanation:

A reducing agent is defined as an element which tends to lose electrons to other element leading to an increase in its oxidation number.

In the given reaction, oxidation state of sulfur in S_{2}O^{2-}_{3} is +2 and I_{2}(aq) has 0 oxidation state.

In S_{4}O^{2-}_{6}(aq) oxidation state of S is 2.5 and in 2I^{-}(aq) oxidation state of I is -1.

Since, an increase in oxidation state of S is occurring from +2 to +2.5. Hence, it is acting as a reducing agent.

Thus, we can conclude that reducing agent in the given reaction is S_{2}O^{2-}_{3}.

8 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
Other questions:
  • What do elements in the first two columns of the periodic table have in common
    6·1 answer
  • Which of the following statements is true? Hydroelectric power plants do not impact the environment.
    9·2 answers
  • Watch this video to observe a synthesis reaction, and then answer the questions that follow. Part A What are the reactants in th
    8·1 answer
  • Determine the percent yield if 155g of Hydrogen should have been produced,
    7·1 answer
  • Choose the pair of substances that are most likely to form a homogeneous solution.
    11·2 answers
  • A measure of kinetic energy of particle motion within a substance is_____.​
    5·1 answer
  • 2. 7.5 g of potassium react with water to produce potassium hydroxide and hydrogen gas. Calculate the mass of potassium hydroxid
    11·1 answer
  • Based on the information above, do you think that fluorine has common isotopes? Justify your answer.
    10·2 answers
  • Which of the following are products of the light-dependent reactions of photosynthesis that are utilized in the light-independen
    13·1 answer
  • The weak base ionization<br> constant (Kb) for CN is<br> equal to:
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!