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
daser333 [38]
3 years ago
12

With the help of balanced chemical equation explain what happens when:(1)Zinc is put in dilute hydrochloric acid (2)Zinc is put

in concentrated sodium hydroxide.(3)Hydrogen is passed over hot tungsten oxide.(40Hydrogen is reacted with carbon monoxide in presence of a catalyst.

Chemistry
2 answers:
Viktor [21]3 years ago
8 0

Answer:

1) Zn(s)+2HCl(aq)--->ZnCl_{2}+H_{2}(g)

2) Zn+2H_{2}O+2NaO-->Na_{2}Zn(OH)_{4}+H_{2}(g)

3) 3H_{2}(g)+W_{2}O_{3}--->3H_{2}O+2W(s)

4) CO(g)+2H_{2}(g)--->CH_{3}OH

Explanation:

The following happens:

(1)Zinc is put in dilute hydrochloric acid

There is an evolution of hydrogen gas as the Zinc undergoes oxidation by hydrogen and it reduces the hydrogen to hydrogen gas.

Zn(s)+2HCl(aq)--->ZnCl_{2}+H_{2}(g)

(2)Zinc is put in concentrated sodium hydroxide.

Again there is evolution of hydrogen gas and formation of zincate sodium. This happens when we heat the mixture.

Zn+2H_{2}O+2NaO-->Na_{2}Zn(OH)_{4}+H_{2}(g)

(3)Hydrogen is passed over hot tungsten oxide.

The hydrogen reduces the tungsten metal during the reaction and it gives solid tungsten metal.

3H_{2}(g)+W_{2}O_{3}--->3H_{2}O+2W(s)

(4) Hydrogen is reacted with carbon monoxide in presence of a catalyst.

This is producer gas reaction.

CO(g)+2H_{2}(g)--->CH_{3}OH

UkoKoshka [18]3 years ago
6 0
Find the attached document.

You might be interested in
Conduction happens as energy flows from a warmer object to a cooler object. Which of the following is evidence of conduction?
Dmitrij [34]

Explanation:

Conduction is a form of heat transfer between one body and another. It usually occurs when a warmer object is in contact with a cooler one. Heat generally flows from a region of high temperature to a place at a lower temperature.

  • Conduction is very pronounced in solid bodies.
  • The heat transfer causes a net transfer of the average kinetic energy of one body to the other.
  • Some examples are: heating of iron by a hotter metallic body, the pot hand getting hotter as cooking continues, cooling of ice by touching it.
8 0
2 years ago
What does the oxidation state of kr indicate
const2013 [10]
Kr look on periodic table it's krypton elements
8 0
3 years ago
The rate constant for the reaction 3A equals 4b is 6.00×10 how long will it take the concentration of a to drop from 0.75 to 0.2
Lelu [443]

This question is incomplete, the complete question is;

The rate constant for the reaction 3A equals 4B is 6.00 × 10⁻³ L.mol⁻¹min⁻¹.

how long will it take the concentration of A to drop from 0.75 to 0.25M ?

from the unit of the rate constant we know it is a second reaction order

OPTIONS

a) 2.2×10^−3 min

b) 5.5×10^−3 min

c) 180 min

d) 440 min

e) 5.0×10^2 min

Answer:

it will take 440 min for the concentration of A to drop from 0.75 to 0.25M

Option d) 440 min is the correct answer

Explanation:

Given that;

Rate constant K =  6.00 × 10⁻³ L.mol⁻¹min⁻¹

3A → 4B

given that it is a second reaction order;

k = 1/t [ 1/A - 1/A₀]

kt = [ 1/A - 1/A₀]

t = [ 1/A - 1/A₀] / k

K is the rate constant(6.00 × 10⁻³)

A₀ is initial concentration( 0.75 )

A is final concentration(0.25)

t is time required = ?

so we substitute our values into the equation

t = [ (1/0.25) - (1/0.75)] / (6.00 × 10⁻³)

t = 2.6666 / (6.00 × 10⁻³)

t = 444.34 ≈ 440 min     {significant figures}

Therefore it will take 440 min for the concentration of A to drop from 0.75 to 0.25M

Option d) 440 min is the correct answer

6 0
3 years ago
A solid is crushed into a powder is chimacal change or pysical change
SSSSS [86.1K]

Answer:

Physical Change

Explanation:

A solid being crushed into a powder is a physical change because a chemical change is when substances combine to create new substances.

Hope this helps :)

4 0
2 years ago
From the time a drug is discovered, a drug is given this name which is assigned by the International Union of Pure and Applied C
sweet-ann [11.9K]

Answer:

A. Chemical name

Explanation:

The Chemical Name is the name generated by applying the naming conventions of the International Union of Pure and Applied Chemistry (IUPAC). The correct names of compounds contained in drug products can be formed by implementing these rules

7 0
3 years ago
Other questions:
  • What is the reading on your balance and that of your partner?what do these values represent?
    7·1 answer
  • A worker drops a wrench from the top of a tower 92.6 m tall. What is the velocity when the wrench strikes the ground? The accele
    7·1 answer
  • Which element has the element configuration 1s2 2s2 2p4
    9·1 answer
  • Express 0.5 mg/mL in ug/uL
    9·1 answer
  • Given the atomic weights of carbon, 12.01; hydrogen, 1.01; and oxygen, 16.0, what is the molar mass of glucose?
    7·2 answers
  • Why are models used for understanding cells
    14·1 answer
  • 5 points<br> What do you think photosynthesis means ?
    7·1 answer
  • A sample of a compound containing only carbon and hydrogen was burned to produce 1.36g of water and 5.22g of carbon dioxide. Cal
    15·1 answer
  • A concentration cell is constructed by using the same half-reaction for both the cathode and anode. What is the value of standar
    13·1 answer
  • Why is methanol written as ch3oh instead of ch4o?​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!