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
ad-work [718]
2 years ago
13

5. Which of the following statements is incorrect?

Chemistry
1 answer:
Vikki [24]2 years ago
6 0

Answer:

c- dry cells can not be recharged

You might be interested in
Acetic acid (HC2H3O2, Ka=1.8x10^-5) is a weak acid. Calculate the pH of an aqueous solution of .25M acetic acid.
tensa zangetsu [6.8K]

Answer: The pH of an aqueous solution of .25M acetic acid is 2.7

Explanation:

HC_2H_3O_2\rightarrow H^+C_2H_3O_2^-

 cM              0             0

c-c\alpha        c\alpha          c\alpha  

So dissociation constant will be:

K_a=\frac{(c\alpha)^{2}}{c-c\alpha}

Give c= 0.25 M and \alpha = ?

K_a=1.8\times 10^{-5}

Putting in the values we get:

1.8\times 10^{-5}=\frac{(0.25\times \alpha)^2}{(0.25-0.25\times \alpha)}

(\alpha)=0.0084

[H^+]=c\times \alpha

[H^+]=0.25\times 0.0084=0.0021

Also pH=-log[H^+]

pH=-log[0.0021]=2.7

Thus pH is 2.7

5 0
3 years ago
What is the gram-formula mass of Ca3(PO4)2
Sindrei [870]
310.17 grams so there
4 0
3 years ago
This infectious disease requires a special mask for protection
11111nata11111 [884]

Answer:

the black plague

Explanation:

6 0
3 years ago
Read 2 more answers
1.what is the mass of an atom.<br>2.what is the difference between an ion and atom.​
blsea [12.9K]

Answer: Atoms are single neutral particles, and an ion is a positively or negatively charged particle.

Explanation:

6 0
3 years ago
In the oxidation reduction reaction 2FeCl2 + Cl2 = 2FeCl3 what substance is reduced? What substance is oxidized?
marishachu [46]

Answer:

Iron is oxidized while chlorine is reduced.

Explanation:

The oxidation reduction reactions are called redox reaction. These reactions are take place by gaining or losing the electrons and oxidation state of elements are changed.

Oxidation:

Oxidation involve the removal of electrons and oxidation state of atom of an element is increased.

Reduction:

Reduction involve the gain of electron and oxidation number is decreased.

Consider the following reaction:

2FeCl₂  + Cl₂  →  2FeCl₃

in this reaction the oxidation state of iron is increased from +2 to +3. That's why iron get oxidized and it is reducing agent because it reduced the chlorine. The chlorine is reduced from -2 to -3 and it is oxidizing agent because it oxidized the iron.

2Fe⁺²Cl₂⁻²

2Fe⁺³Cl₃⁻³

The iron atom gives it three electrons to three atoms of chlorine and gain positive charge while chlorine atom accept the electron and form anion.

4 0
3 years ago
Other questions:
  • What is the total number of atoms in one unit (molecule or formula unit) of nacl?
    14·1 answer
  • Given the reaction below, how will the concentration of D change if the concentration of B decreases by 0.045 M? 3A(g)+2B(g)⇋2C(
    15·1 answer
  • How do the properties of table salt compare with those of sodium and chlorine?
    7·1 answer
  • Pls help me here, thanks in advance
    10·2 answers
  • State 2 ways in which adaptation help animals?
    9·1 answer
  • Benzene and toluene form ideal solutions. Consider a solution of benzene and toluene prepared at 25 ^ { \circ } \mathrm { C }25∘
    12·1 answer
  • How is a planet different from a moon? (2 points)
    12·1 answer
  • What volume in mL of 0.300 M NaF would be required to make a 0.0450 M solution of NaF when diluted to 250.0 mL with water?
    10·1 answer
  • What is chemistry in simple terms?​
    9·1 answer
  • How many moles of hydrogen atoms are there in one mole of (NH4)PMo12O40?
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!