CHEMISTRY HIGH SCHOOL

When a chemical reaction is in equilibrium, a. the reaction is proceeding at its maximum rate.
b. there is no net change in the amount of substrates or products.
c. the reaction has stopped.
d. there are equivalent amounts of substrates and products.

Answers

Answer 1
Answer:

Answer: b. there is no net change in the amount of substrates or products.

Explanation:

The reactions which do not go on completion and in which the reactant forms product and the products goes back to the reactants simultaneously are known as equilibrium reactions.

Equilibrium state is the state when reactants and products are present but the concentrations does not change with time.

A\rightleftharpoons B

For a chemical equilibrium reaction, equilibrium state is achieved when the rate of forward reaction becomes equals to rate of the backward reaction.

Related Questions

Consider the following for the reaction at 300 K:3 ClO– (aq)  ClO3– (aq) + 2 Cl– (aq)ExperimentInitial [ClO–] (M)Initial Rate of Formation of ClO3– (aq)(M/min)10.4521.048 × 10–420.9034.183 × 10–4(7) (4 pts) What is the order of the reaction with respect to ClO– (aq)?A) 0B) 1C) 2(8) (4 pts) For experiment #2, what is the initial rate of consumption of ClO–
A solution containing HCl would likely have
Why is calcium harder than potassium?
How many moles of carbon are produced when 1745 g of glucose decomposes according to the following equation? C6H12O6 → 6C 6H2O
Which aqueous solution will cause the bulb to light?

In a redox reaction, which particles are lost and gained in equal numbers

Answers

In a redox reaction electrons are lost and gained in equal numbers. The species that is oxidized gives electrons to the species that is reduced. I hope this helps. Let me know if anything is unclear.

If air is cooled to the point at which its water vapor condenses, it has reached itsa. dew point.
b. triple point.
c. lambda point.
d. freezing point.

Answers

a. dew point, i surlly :)

In the last 100 years, the level of CO2 in the atmosphere has been significantly increased by man by: pesticides the burning of fossil fuels domestic heat incineration of waste products

Answers

The major contributor of CO2 in the atmosphere which has a human source is the burning of fossil fuels - this is the correct answer. This is especially serious concern since the industrialization, but also includes heating with coal in people's private homes.

Answer:

The correct answer is Option (2)- Burning up of fossil fuels

Explanation:

Fossils are the remnants of the ancient plants and animals that were buried millions of years ago. Those fuels that are made up of these fossilized matters are commonly termed as fossil fuel. For example, Petroleum, Coal and natural gas. These are the major source of energy.

These fossil fuels are limited in amount and are non-renewable sources of energy. These are exploited rapidly by human beings. This burning up of fossil fuels leads to the production of a large amount of Carbon dioxide (CO₂) gas that causes a significant impact on the atmosphere. The increase in the CO₂ content also leads to an increase in the global temperature of the earth.

In the last 100 years, the CO₂ level in the atmosphere has immensely increased.

Hence, the correct answer is option (2).

1. When a metal and a(n) ___ bond, they do not share electrons. 2. The ___ atom transfers one or more valence electrons to the ____ atom, forming a chemically stable compound. 3. A(n) ___ is an atom that is no longer electrically neutral because it has lost or gained one or more valence electrons. a. An atom that loses one or more valence electrons becomes an ion with a(n) ___ charge.

Answers

Answer:

1 . Nonmetal

2. metal, non metal

3. Ion

4. positive

Please help with this.

Answers

1. Double-Replacement reactions

2. Decomposition  

3. Combustion

4. Syntesis

5. Single replacement

Further explanation

Given

Chemical equations

Required

Type of reaction

Solution

1. 2AgNO₃ + MgCl₂ ⇒ 2AgCl + Mg(NO₃)₂

Double-Replacement reactions. Happens if there is an ion exchange between two ion compounds in the reactant

2. 2KBr⇒2K +Br₂

Decomposition  

Single compound breaks down in to 2 or more products

3. C₃H₈ + 5O₂ ⇒ 4H₂O + 3CO₂

Combustion

Hydrocarbon and Oxygen reaction and form water and carbon dioxide

4. NaO + H₂O ⇒ NaOH

Syntesis

2 or more reactants combine to form a single product

5. Zn + CuCl₂ ⇒ZnCl₂ + Cu

Single replacement

One element replaces another element from a compound

Base your answers to questions 76 through 79 on the information below and on your knowledge of chemistry.During a laboratory activity, a student places 25.0 mL of HCl(aq) of unknown concentration into a flask. The student adds four drops of phenolphthalein to the solution in the flask. The solution is titrated with 0.150 M KOH(aq) until the solution appears faint pink. The volume of KOH (aq) added is 18.5 mL.

76 What number of significant figures is used to express the concentration of the KOH (aq)?

77 Complete the equation in your answer booklet for the neutralization reaction that occurs during the titration.

HCl + KOH--> ________________

78 Determine the concentration of the HCl(aq) solution, using the titration data.

79 Describe one laboratory safety procedure that should be used if a drop of the KOH(aq) is spilled on the arm of the student.

Answers

The precaution taken when KOH is dropped on the arm of a student is to apply plenty water over the affected area.

What is titration?

The term titration has to do with a reaction between an acid and a base to form salt and water only.

In this reaction, we have; KOH + HCl -----> KCl + H2O. The concentration of KOH was expressed to two significant figures.

The concentration of HCl is obtained from;

0.150 M * 18.5 mL * 1/25.0 mL * 1 = 0.11 M

The precaution taken when KOH is dropped on the arm of a student is to apply plenty water over the affected area.

Learn more about titration:brainly.com/question/8832859

#SPJ2
76. 3 significant figures
77. KCl +H(little)2O
78. 0.1M
79. rinse it off with water or tell the teacher
Hope this helps :)
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