vineethavijayan539

A. What is an oxidizing agent?

C. Which of the following statements is true about oxidation states?

D. Consider the reaction below. Al(s) + Cu²⁺(aq) → Al³⁺(aq) + Cu(s) Choose the reaction that is balanced using the half-reaction method.

E. How can rust be prevented?

Check all that apply.

PLEASE ANSWER ALL. THANKS! NO NEED EXPLANATIONS..

Hello, I would appreciate if someone were to help me answer the following questions. Any help would be much appreciated. Thank you!

1.

2I−+Cl2→I2+2Cl−

Which substance is oxidized?

Which substance is reduced?

2.

Oxidation half-reaction for 2Al(s)+6H+(aq)→2Al3+(aq)+3H2(g)

Reduction half-reaction for 2Al(s)+6H+(aq)→2Al3+(aq)+3H2(g)

Oxidation half-reaction for 2Cu+(aq)+Mg(s)→Mg2+(aq)+2Cu(s)

Reduction half-reaction for 2Cu+(aq)+Mg(s)→Mg2+(aq)+2Cu(s)

3.

Oxidized or Reduced?

Zinc

Water

Iron

Copper

4.

Which of the following increases or decreases the corrosion rate?

Electroplaying the metal surface

Painting the metal surface

Putting strain on the metal

Coating the metals with varnish or grease

Exposing the metal to an electrolyte

Placing the metal objcect in a moist room

5.

Which of these occur at anode vs. at cathode during the rusting of iron?

Oxygen gains electrons

Iron loses electrons

OH- is formed

Fe2+ is formed

6.

What is the main active ingredient in common household bleach, also known as chlorine bleach?

a. Ca(OCI)2

b. H2O2

c. HOCl

d. NaOCl

7.

Oxidation or reduction?

Sn2+ ------> Sn4+ + 2e-

Bi3+ + 3e- -----> Bi

Zn -----> Zn2+ + 2e-

H+ + e- ------> H

8.

Combine the following two reactions to obtain a balanced overall redox reaction.

Sn2+ → Sn4++2e− and Bi3++3e− → Bi

Zn → Zn2++2e− and H++e− → H

9.

Which of the following statements about freeing metals from their ores is true?

a. Other metals cannot be used to remove a metal from its ore.

b. Vitamin C removes metal from its ore by inhibiting air oxidation.

c. Hydrogen cannot be used to remove metal from its ore because it is an oxidizing agent.

d. Coke or coal can be used to remove a metal from its ore.

Thanks in advance!

Can you please answer this question

It requires substantial energy to reduce metal ore to pure metal. The reverse process, corrosion, happens spontaneously. The rusting of iron, the tarnishing of silver, and the formation of patina on copper and brass are some common examples of corrosion.

Rusting is the greatest corrosion problem because it occurs rapidly and because so many objects are made of iron and steel. A great deal of the annual production of iron goes simply to replace that lost by rusting. Iron will not rust in dry air or in water that is completely free of air. Oxygen gas and water must be present for iron to rust. Describe chemistry and electrochemistry of corrosion of iron and copper. In each redox reaction, specify the element that is being oxidized, the element that is being reduced, and identify the oxidizing and the reducing agent. Why cars rust more rapidly near the beach or in cold climate where salt is used to de-ice the roads?

What volume of 0.10 M NaOH can be prepared from 250. mL of 0.30 M NaOH?  

a. 0.75 L  

b. 750 L  

c. 0.25 L  

d. 0.075 L  

e. 0.083 L

One way of preventing the corrosion of iron is to prevent oxygen and water from coming into contact with the iron. Is this a practical approach to preventing corrosion on a large scale? What are the drawbacks? Explain.

How to print a hanoi tower using python?

What is an array? Give examples.

What constitutes a fraud, and is the withholding problem a fraud?

Which of the areas seen the figure must be occupied by T lymphocytes, at least for a while, but is NOT required for the production of B lymphocytes? -the general circulation -lymph nodes -the thymus -the bone marrow

Compare and contrast primary lymphoid organs and lymphoid organs. Other than being lymphoid organs that are essential for immune responses describe one way in which they are similar in their composition and one way in which they are different in their function. using complete sentence name one primary lymphoid organ and one secondary lymphoid organ as examples:

(1)Describe an example of primary lymphoid organ.

(2) Describe an example of secondary lymphoid organ.

(3) Describe one similarity in composition between the organs you described above ( be specific if you refer to cell types)

(4) Describe one difference in function between the organs you described above.

THANK YOU

Which of the following statements is true regarding memory in humoral immunity? Check all that apply.

A.Memory lasts longer in humoral immunity than in cellular immunity.

B.Memory B-lymphocytes attack the antigen directly without the need to form plasma cells.

C.Memory B-lymphocytes are found mainly in the lymph nodes.

D.Plasma cells form within hours in primary exposure, creating a response so rapid that no noticeable signs of illness appear.

E.When memory B-lymphocytes attack an antigen, it is called the "primary response."

1. A) What are the main differences between innate and adaptive immunity? B) On which type of immunity do vaccines work?

2. A) What is the difference between humoral and cell-mediated immunity? B) Give an example of each: adaptive cell-mediated immunity, innate cell-mediated immunity, adaptive humoral immunity and innate humoral immunity

The primary difference between cell mediated immunity and humoral (antibody-mediated) immunity is that: (a) helper T cells only play a role in antibody-mediated immunity (b) two of these are correct (c) in cell mediated immunity, cytotoxic t cells become active (d) only antibody-mediated immunity is an example of specific immunity (e) in humoral immunity, antibodies are produced

What are the primary and secondary lymphoid organs of humoral and cellular immunity? What is their significance in immunity?

We see by 

A. Ears 

B. Eyes 

C. Nose 

D. Nails

What's life?

What do we mean by ventilation, external respiration and internal respiration. What events take place in each of them and what are the locations

What are the differences in external and internal respiration?

How can humans survive on one kidney?

The exchange of oxygen and carbon dioxide between the air in the alveoli and blood in the lungs is called:
a) cellular respiration
b) external respiration
c) systemic respiration
d) ventilation
e) internal respiration

What are respiration?

What are pores?

Why does thyroid gland enlarge both in hypothyroidismand hyperthyroidism?
Hypothyroid goitre is due to lack of iodine in diet andhyperthyroid goitre (Exopthalmic goitre, Grave's disease) is due tooversecretion of thyroxine, or Thyroid stimulating Hormone. Howdoes these two apparently opposite effects produce similar physicalmanifestation of the disorder (symptom) i.e is the enlargement ofthe thyroid gland?

What is goitre?

Seeds of angiosperms Select one: a. gain water in the late stages of embryonic development. b. are the structures in which embryos develop. c. are enclosed within the embryo sac. d. form outside the ovary. e. are derived from the ovary.

Who is matrix and their motive?

How is the embryo sac formed?

How do you guarantee the success of product? 

How can we make mars a habitable planet?

Who was the third person to walk on the moon? 

Solve the systems by graphing.

y = -2x - 8

X-Y = 5

solve the system by elimination

6x - 10y = - 18

3x + 10y = 36

Describe the colors and the number of bonds for different atoms inthe molecular model.
A: Carbon
B: Hydrogen
C: Oxygen
D: Chlorine

(i) The value of x such that 8x +4, 6x -2 ,2x+7 form an A.P.

(a) 15 (b) 2 (c) 12 (d) 7.5

Write the chemical symbol for each of the following elements:

a) strontium
b) xenon
c) oxygen
d) zinc
e) fluorine
f) sodium
g) copper
h) nickel

Thank you I will post more on Monday