CHEMISTRY HIGH SCHOOL

Which statement must be true for any chemical reaction at equilibrium?(1) The concentration of the products is greater than the concentration of the reactants.
(2) The concentration of the products is less than the concentration of the reactants.
(3) The concentration of the products and the concentration of the reactants are equal.
(4) The concentration of the products and the concentration of the reactants are constant.

Answers

Answer 1
Answer: The correct answer is 3. The concentration of the product and the concentration of the reactants are equal. That is because matter cannot be created or destroyed and the product cannot randomly become something else in the reaction, nor can a reactant change into something different. Simply put, you cannot turn things like water into gold because there will always be an equilibrium.
Answer 2
Answer:

Answer:

Answer is 4 The concentration of the products and the concentration of the reactants are constant.

Explanation:

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Hydrogen bonding is a type of(1) strong covalent bond
(2) weak ionic bond
(3) strong intermolecular force
(4) weak intermolecular force

Answers

Option 3. strong intermolecular force

Certain substances such as H2O, HF, NH3 from hydrogen bonds, and the formation of which affects properties (mp,bp,solubility) of substance. Other compounds containing OH and NH2 groups also form hydrogen bond. Molecules of many organic compounds such as alcohols, acids, amines, and amino acids contain these groups, and thus hydrogen bonding plays an important role in biological science.

How many protons, electrons, and neutrons does the following isotope contain? 40 Ar

Answers

The isotope 40Ar contains 18 protons, 18 electrons, and 22 neutrons.

The isotope 40Ar refers to the isotope of argon, which has an atomic number of 18.

Since the atomic number represents the number of protons in an atom, we can conclude that the isotope 40Ar contains 18 protons.

Argon is a neutral atom, so the number of electrons also matches the number of protons. Therefore, the isotope 40Ar contains 18 electrons.

To find the number of neutrons, we need to subtract the atomic number (protons) from the mass number (protons + neutrons). The mass number of 40Ar is 40. Subtracting the atomic number of 18 from the mass number gives us:

Number of neutrons = Mass number - Atomic number

Number of neutrons = 40 - 18

Number of neutrons = 22

Therefore, the isotope 40Ar contains 18 protons, 18 electrons, and 22 neutrons.

Learn more about  atomic number from the link given below.

brainly.com/question/16858932

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Answer:

18 protons, 18 electrons, 22 nuetrons

Explanation:

Argon has an atomic # of 18. Atomic #s show the amount of protons and electrons it has. Atomic mass - atomic # = # of nuetrons.  40-18=22

Describe how spead, velocity and
brcoloration are related.

Answers

Answer:

Speed, being a scalar quantity, is the rate at which an object covers distance. The average speed is the distance (a scalar quantity) per time ratio. On the other hand, velocity is a vector quantity; it is direction-aware. Velocity is the rate at which the position changes.

Which best describes is the ∆G, ∆H, ∆S and T of a forest fire?

Answers

Below are the choices and the answer is C. 

A. ∆G=negative, ∆H= positive, ∆S= positive, T = large 
B. ∆G=positive, ∆H= positive, ∆S= positive, T = large 
C. ∆G=negative, ∆H= negative, ∆S= positive, T = large 
D. ∆G=negative, ∆H= positive, ∆S= negative, T = large 
E. ∆G=positive, ∆H= positive, ∆S= negative, T = large

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Given the balanced equation representing a reaction:H+(aq) + OH-(aq) ==> H2O(l) + energy
In this reaction there is conservation of
(1) mass, only
(2) mass and charge, only
(3) charge and energy, only
(4) charge, energy, and mass

Answers

Answer: option (4) charge, energy, and mass.


Justification:


1) Charge, energy, and mass are always conserved in every chemical reaction.


Charge, energy and mass are not created nor destroyed, but can be transferred.


2) The charge can only be transferred by the motion of electrons, so the charge can move and end up on a different atom, but when you add up all the charge is conserved.


The charge balance is verified in the given equation since:


left side right side


(1+) + (1-) = 1 - 1 = 0 0


∴ The total charge of the reactants equals the total charge of the products.


3) As for energy, the right side shows the "apparition" of some energy. That means that the reaction is exothermic, i.e. it releases energy.


The energy released is the net result of the difference in the potencial chemical energy of the bonds of the products and the reactants.


The reactants have more chemical energy stored than the reactants, so potential energy was transformed into heat energy.


4) As for the mass, its conservation is verified when you check that there are the same number of particles of each spieces: two particles of hydrogen in the reactand side, such as in the products; and the particles of oxygen are one in the reactants and one in the products.

The volume of a pond being studied for the effects of acid rain is 35 kiloliters (kL). There are 1,000 liters (L) in 1 kL and 10^3 microliters (mL) in 1 L. What is the volume of this pond in microliters?

Answers

The volume of a pond being studied for the effects of acid rain is 35 kiloliters (kL). There are 1,000 liters (L) in 1 kL and 10^3 microliters (mL) in 1L.

35 kiloliters ( 1000 liters/1 kiloliters) (10^3 microliters / 1liters)
=35,000,000 microliters
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