CHEMISTRY HIGH SCHOOL

Balance the chemical equations of the following oxidation-reduction reactions. a) HCI + HNO3 → NOCI + Cl₂ + H₂O; b) CO + I₂O5 → CO₂ + I₂ ​

Answers

Answer 1
Answer:

Answer:

a) Let's balance the chemical equation for the reaction between HCl and HNO3 to form NOCl, Cl2, and H2O:

First, write the unbalanced equation:

HCl + HNO3 → NOCl + Cl2 + H2O

Now, balance it step by step:

1. Balance the atoms other than hydrogen and oxygen:

HCl + HNO3 → NOCl + Cl2 + H2O

1 1 1

2. Balance the oxygen atoms by adding water (H2O):

HCl + HNO3 → NOCl + Cl2 + H2O

1 1 1 +1

3. Balance the hydrogen atoms by adding HCl on the left side:

HCl + HNO3 → NOCl + Cl2 + H2O

1 1 +1 1 +1

4. Balance the chlorine atoms by adding Cl2 on the left side:

HCl + HNO3 → NOCl + Cl2 + H2O

1 1 +1 1 +1

Now, the equation is balanced.

b) Let's balance the chemical equation for the reaction between CO and I2O5 to form CO2 and I2:

First, write the unbalanced equation:

CO + I2O5 → CO2 + I2

Now, balance it step by step:

1. Balance the atoms other than carbon and oxygen:

CO + I2O5 → CO2 + I2

1 1

2. Balance the oxygen atoms by adding CO2 on the left side:

CO + I2O5 → CO2 + I2

1 1 +2

3. Balance the carbon atoms by adding CO on the left side:

CO + I2O5 → CO2 + I2

1 +1 +2

4. Balance the iodine atoms by adding I2 on the left side:

CO + I2O5 → CO2 + I2

1 +1 +2 +5

Now, the equation is balanced.

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What would happen if u washed the benzoic acid in the Büchner funnel with hot solvent ? answer ASAP

Answers

Benzoic acid is able to dissolve in hot solvents. That means that it would not be filtered out by the buchner funnel since the buchner funnel has holes in it that make it so that the solvent can get through but solids can't (the benzoic acid would be dissolved in the solvent and therefore would leave the funnel with the solvent through the holes).  

Note that it is important that the solvent is hot.  Benzoic acid will start to precipitate out (re crystallize) as soon as the temperature drops which will make it so that some of the benzoic acid would get caught in the buchner funnel.

I hope this helps.  Let me know in the comments if anything was unclear.

Why is crushed ice used for snow cones? a) decreasing the pressure helps dissolve more flavoring
b) increasing the temperature helps dissolve more flavoring
c) increasing the surface area helps dissolve more flavoring
d) decreasing agitation helps dissolve more flavoring

Answers

The reason for crushing ice for snow cones is C) increasing the surface area helps dissolve more flavoring. The amount of flavoring absorbed depends on the temperature and the surface area of contact. Because the temperature can not be increased without melting the ice, the ice is crushed. This increases its surface area and more flavoring is dissolved.
The answer to the question is C, increasing the surface area helps dissolve more flavoring. The motivation behind why squashed ice utilized for snow cones is a direct result of expanding the surface range breaks down all the more enhancing. The snow cone is a cone-molded paper glass that contains little bits of ice enhanced with a sweet syrup.

The valence electrons in an atom of phosphorusin the ground state are all found in
(1) the first shell
(2) the second shell
(3) the third shell
(4) the fourth shell

Answers

The valence electrons in an atom of phosphorus in the ground state are all found in IN THE THIRD SHELL.

Phosphorus has an atomic number of 15, therefore its electronic configuration is 2, 8, 5. This configuration implies that, phosphorus electrons are distributed in three different shells and the number of electrons in the outermost shell, which is the third shell, is 5. The ground state refers to a state, where the atoms of phosphorus are not excited. Electrons move away from their ground states when they are excited.
The answer to this question is 3

19 An effective collision between reactant particles requires the particles to have the proper(1) charge and mass
(2) charge and orientation
(3) energy and mass
(4) energy and orientation

Answers

An effective collision between reactant particles requires the particles to have the proper energy and orientation. The particles must have the minimum energy to collide with each other and proper orientation to overlap.

What is collision ?

Collision is a short term force acting between two object when they hit together. According to the kinetic molecular theory of matter, only effective collisions leads to the chemical bonding between atoms.

To make effective collisions, the atoms or constituent particles must acquire a minimum amount of energy  to overcome the barrier potential of reaction.

Similarly, the particles must have proper orientation to have overlapping between their valence shell and form chemical bonds. Inappropriate orientation does not leads to the formation of bond between particles. Hence, option 4 is correct.

Find more on collision;

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(4) energy and orientation
They need the energy to be able to break the original bonds, and they need the orientation to be able to bond with the new atoms

Which statement explains why the bonds between nonmetals tend to be covalent? The bonds are found to be nondirectional. They have large differences in electronegativity. They have small differences in electronegativity. They have ions that produce an electrostatic pull.

Answers

Correct Answer: They have small differences in electronegativity (statement 3)
Reason: 
The nature of chemical bond between atoms is primarily driven by the electronegativity  difference between constituent atoms. If electronegativity difference between constituent atoms is significantly higher, ionic bond formation is preferred. On other hand, low difference in electronegativity values, favours formation of covalent bond. 

Which statement describes a chemical property of the element magnesium?(1) Magnesium is malleable.
(2) Magnesium conducts electricity.
(3) Magnesium reacts with an acid.
(4) Magnesium has a high boiling point.

Answers

Answer: option 3) magnesioum reacts with an acid.


Justification:


1) Malleability, conduction of electricity, and boiling point are physical properties.


2) Maleability is the ability to be transformed into foil. It is just a change in form. So, it is a physical property.


3) The metals conduct electricity in virtue of the array of the atoms, which permtis the flow of the electrons, but it does not involve a chemical change, so it remains being a physical proerty.


4) Boling point is the temperature at which a substance passes from liquid state to gas state, which are just different forms of the same substance. So, it is other physical property.


5) Reaction with an acid is indeed a chemical transformation: the metal (magnessium) will form a chemical bond with some spieces of the acid to form a new compound. This is a chemical reaction in virtue of the chemcial properties of the substance (its ability to react with acids)

Magnesium reacts with an acid.
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