CHEMISTRY MIDDLE SCHOOL

Choose the correct coefficients to balance the following equation: __Zn + __HCl Imported Asset __ZnCl2 + __H2.1, 2, 2, 2

1, 2, 1, 1

2, 4, 2, 2

0, 2, 0, 0

Answers

Answer 1
Answer:

Answer:

option b = 1,2,1,1

Explanation:

Chemical equation:

Zn + HCl → ZnCl₂ + H₂

Balanced chemical equation:

Zn + 2HCl → ZnCl₂ + H₂

There are two atoms of hydrogen one atom of zinc and 2 atoms of chlorine on both side of equation.

The common oxidation state of zinc is +2 while tat of chlorine is -1 that's why two chlorine atoms combine with one atom of zinc to accept two electrons.

Zn⁺²Cl₂²⁻ negative and positive charges are equal in magnitude that's why over all compound is neutral.

While two atoms of hydrogen combine with each other through covalent bond by shearing the electrons.

The oxidation state of zinc is increased from 0 to +2 so it gets oxidized while that of chlorine is -1 to -2 is chlorine gets reduced.

Related Questions

If you have a 92.0 gram sample of water, then what mass of hydrogen and what mass of oxygen are in the sample? Make sure you answer in “grams” of Hydrogen and “grams” of Oxygen.
Convert 2.70atmtotorr
Titanium has three common isotopes: 46Ti (8.0%) , 48Ti (73.4%) , 49Ti 5.5%, 50Ti ( 5.3%). What is the average atomic mass of titanium? Work please too!
Which soil horizon contains a layer of partially weathered or unweathered rock? A. EB. RC. OD. C
One balloon was only partly filled when put on the plane. During the flight, the balloon volumeincreased from 7 L at 1.0 atm to 9 L. What was the cabin pressure on the airplane during the flight?(Assume the balloon stretched very easily and the temperature was constant.)

Two or more assistanceSubstances form a _____ when they come together without forming a new substance

Answers

I believe it would be a compound.

Polished metals have a metallic luster, which means that?

Answers

Metallic luster refers to the way light casts off of a mineral. Polished metals such as gold have a metallic luster, which makes them look bright and shiny, and reflect more light than other minerals. There are also minerals that have metallic luster, but are not shiny or reflect much light, which is called dull metallic luster. 

Metallic luster - bright, shiny
Dull metallic luster - not shiny

Does a human body use neon???

Answers

 No uses regarding the human body; it's a noble gas and does not react with anything.

C. What are the characteristics of an old river?

Answers

Answer:

Explanation:

An old river occurs at the plain course and it is at its lower stage.

Here:

  1. The river gradient is very gentle as it is on a plain.
  2. An old river would be at its depositional phase where all the sediments its carries are being laid down.
  3. It has a low velocity and a very sluggish flow.
  4. Lateral erosion is very active at this stage.
  5. The volume of the river increases substantially as more river tributaries joins.
  6. Some of the river features are flood plains, leeves, ox-bow lakes, delta e.tc.

What kind of mistake has a scientist made if he accidentally spills a chemical that causes invalid conclusions? Is it a honest mistake or a biased mistake

Answers

honest mistake because he accidentally spilled it

An elements atomic number is 99. How many protons would an atom of this element have ?

Answers

A elements atomic number is is number of protons. It would have 99 protons. Because an atom by nature is neutral, it would also have 99 electrons
Other Questions
When the ocean washes farther up shore
Daniel observed and compared some stars at night and recorded his observations in a chart.Daniel later discovered that star X is farther away from Earth than the other stars he observed, and star Z is closest to Earth.Which conclusion is best supported by Daniel’s observations and discoveries?Star X is more luminous than both stars Y and Z. Star X is more luminous than star Z, but not star Y. Star Y is more luminous than star X. Star Z is more luminous than star Y. PLEASE HELP
Examples of solid mixtures in a classroom
Veronica’s velocity was measured as 4.3 m/s. She displaced 20 meters in 4.7 seconds. Which piece of information is missing for the correct calculation of velocity?A) the directionB) the end point