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
hram777 [196]
3 years ago
11

Which increases the rate of a chemical reaction? A. a catalyst B. a higher volume C. a lower pressure D. a lower temperature

Chemistry
2 answers:
Tanya [424]3 years ago
6 0
A. A catalyst because it increases the time that it takes to happen
taurus [48]3 years ago
3 0
A catalyst will increase the rate of a chemical reaction by changing the reaction mechanism so that the reaction has a lower activation energy.  

a higher volume will decrease the concentrations which will intern decrease the number of collisions which will slow down the rate of the reaction since collisions between reactants are what make reactions happen.  A lower temperature causes the molecules to slow down thereby lowering the collision rate which will lower the reaction rate.  A lower pressure will lower the number of collisions which will intern result in a lower reaction rate (this can be thought of as a lower concentration since lower pressures involve less gas per unit volume)
You might be interested in
The reaction of sulfuric acid (H2SO4) with potassium hydroxide (KOH) is described by the equation below. Suppose 0.05 L of KOH w
strojnjashka [21]

From the chemical equation given:

H2SO4+2KOH--->K2SO4+2H2O

the two reactants, H2SO4 and KOH, are in 1:2 stoichiometric ratio.

No. of moles of KOH = 2* no. of moles of H2SO4

=2*0.1*0.033

The concentration of KOH = no. of moles / volume

=2*0.1*0.033/0.05

=0.132M

3 0
3 years ago
Read 2 more answers
Which of the following is not the same as 2.97 milligrams? 0.0000297 kg, 0.00297 g, 0.297 ch
Travka [436]

the correct answer its  0.002975

4 0
4 years ago
Read 2 more answers
How many moles of oxygen are required to react completely with 5 mol C8H18?
Nata [24]

Answer:

62.5 moles of O₂.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

2C₈H₁₈ + 25O₂ —> 16CO₂ + 18H₂O

From the balanced equation above,

2 moles of C₈H₁₈ reacted with 25 moles of O₂.

Finally, we shall determine the number of mole of O₂ needed to react with 5 moles of C₈H₁₈. This can be obtained as shown below:

From the balanced equation above,

2 moles of C₈H₁₈ reacted with 25 moles of O₂.

Therefore, 5 moles of C₈H₁₈ will react with = (5 × 25) / 2 = 62.5 moles of O₂.

Thus, 62.5 moles of O₂ is needed for the reaction.

6 0
3 years ago
What is the nuclear equation for decay of Am - 241
adelina 88 [10]

Americium is a radioactive element .

  • It goes through alpha decay during nuclear reactions .

The nuclear reaction.is given by

\rm {}^{241}_{95}Am\longrightarrow {}^{237}_{93}Np+{}^4_2\alpha

  • Np stands for Nuptunium

Here alpha can be written as He too

3 0
2 years ago
What is the only true way to tell if a chemical reaction has occurred?<br> CFU
Murljashka [212]

Answer:

change of colour

Explanation:

3 0
3 years ago
Other questions:
  • Which is more dense a pound of rice or a pond of cement
    8·1 answer
  • The mass of solute per 100 mL of solution is abbreviated as (m/v). Mass is not technically the same thing as weight, but the abb
    5·1 answer
  • 3.74 ml of carbon dioxide (CO2) accidentally escaped during the experiment, what volume in liters would that be?
    13·2 answers
  • Explain. How you would separate a mixture of water, sand, salt, and iron feelings into its four component parts
    12·1 answer
  • In a solution, the substance that changes phase is the _____, while the substance that does not change phase is the____.
    9·1 answer
  • In order to get high-quality energy, you must use high-quality energy. This rule is the result of which of the following? a.the
    8·1 answer
  • A sample of a substance has a high density, yet a low particle motion. This sample must be a
    9·2 answers
  • Suppose you perform a titration of an unknown weak acid solution. You start with 4.00 mL of the weak acid and find that it takes
    7·1 answer
  • Hillsdale and Cordera are the same distance from the equator, and both are near the ocean. Is Cordera warmer, colder, or the sam
    12·1 answer
  • A greater force is required to move an object with a larger mass than one with a smaller<br> mass.
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!