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
Elza [17]
2 years ago
10

What is the role of a catalyst in a chemical reaction?

Chemistry
1 answer:
Zinaida [17]2 years ago
4 0

A catalyst is a substance that increases the rate of a chemical reaction by lowering the activation energy without itself being consumed by the reaction.

You might be interested in
Change the following word equation into balanced formula equation
Natali [406]

Answer:

Fe + CuO ----> FeO+ Cu

Explanation:

A word equation is a chemical equation in which the reactants and products are represented by words rather than the respective symbols of the species involved in the reaction.

Generally, when writing a balanced reaction equation, it is normal to ensure that the number of atoms of each element on the reactant side is the same as the number of atoms of the same element on the product side. This has been ensured in the reaction above.

The reaction above is possible because iron is higher than copper in the electrochemical series hence iron can displace copper from its compounds.

6 0
2 years ago
Ice and water constitute a system:
kondor19780726 [428]

Answer:

B

Explanation:

It's the same substance but in different states.

HETEROGENEOUS mixtures contain substances that are

not uniform in composition. The parts in the mixture can be separated by physical means.

4 0
3 years ago
A potted plant is placed under a grow lamp, which provides 6,400 J of energy to the plant and the soil over the course of an hou
STatiana [176]

Answer:

823.7g

Explanation:

Using the formula as follows:

Q = m × c × ∆T

Where;

Q = amount of heat (J)

m = mass of substance (g)

c = specific heat capacity (J/g°C)

∆T = change in temperature (°C)

Using the information given in this question as follows:

Q = 6,400 J

m = ?

c of soil = 0.840 J/g°C

∆T = 9.25°C

Using Q = mc∆T

m = Q ÷ c∆T

m = 6,400 ÷ (0.840 × 9.25)

m = 6400 ÷ 7.77

m = 823.7g

8 0
3 years ago
Read 2 more answers
Based on your knowledge of factors that affect the rates of chemical reactions, predict the trend in the last column of the expe
Anika [276]

Factors that increases reaction rate such as increase in concentration or pressure will reduce reaction time whereas factors that decrease reaction rate such as inhibitors will increase reaction time.

<h3>What are the factors that affect reaction rate?</h3>

Factors that affect reaction rate are those factors which increase or decrease the rate of chemical reaction.

The factors that affect reaction rate include:

  • temperature
  • concentration/pressure
  • catalysts
  • surface area
  • nature of substance

Any factor that increases reaction rate such as increase in concentration or pressure will reduce reaction time whereas factors that decrease reaction rate such as inhibitors will increase reaction time.

Learn more about factors affecting reaction rate at: brainly.com/question/14817541

#SPJ1

6 0
2 years ago
• What is produced at the end of the cell cycle? How do they compare to each other and
olga2289 [7]

Answer:

At the end of cell cycle (mitosis replication), two daughter cells are produced. Each contains exactly the same number of DNA content.

6 0
3 years ago
Other questions:
  • He partial pressure of oxygen gas in our atmosphere is 0.21 atm. this is the partial pressure at which human lungs have evolved
    12·1 answer
  • Where is the energy from the sun stored on Earth? A. in rocks B. in green plants C. in ocean water D. in animal bodies
    12·1 answer
  • Is the arctic circle generally warmer or colder than antartica
    11·1 answer
  • What is the layer of Earth's atmosphere that has the coldest temperature range?
    11·1 answer
  • What type of bond would two sulfur atoms require to form a molecule?
    9·2 answers
  • How is heat transferred when a person holds a pen that is already at body<br> temperature?
    15·2 answers
  • What is the mass of a 120 mL sample of pure silicon with a density of 2.3 g/mL?
    9·1 answer
  • Name the valency and symbol of acidic radicals ​
    14·1 answer
  • :( plz help and can u guys help me with my math
    15·2 answers
  • About how long does it take for the reaction to reach equilibrium in this concentration versus time graph?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!