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

Warning signs are sometimes placed on aerosol cans to prevent people from throwing them into a fire. What would be true about th

GarryVolchara [31]

Answer:

The correct option is volume stays constant

Explanation:

When a gas container (in this case an aerosol can) is subjected to heat (from fire), the temperature of the can and subsequently the temperature of the gas itself increases, an increase in the temperature of the gas cause the pressure to also increase; as the gas molecules will collide more and faster with each other and against the wall of the can. However, the volume of the gas will remain the same as before it was subjected to the heat - the gas particles do not get destroyed or increased as a result of the heat (law of conservation of matter explains this).

3 0

3 years ago

Read 2 more answers

The first step in coal formation process is the formation of:

Reil [10]

Do you have a picture of where you go this question from?

4 0

3 years ago

Which salt is produced when NH4OH Reacts with HNO3

borishaifa [10]

Explanation:

When an acid reacts with a base then it results in the formation of salt and water.

$HNO_{3}$ is an acid and $NH_{4}OH$ is a base thus, when we dissolve ammonium hydroxide in nitric acid then it results in the formation of ammonium nitrate and water.

The reaction is as follows.

$NH_{4}OH + HNO_{3} \rightarrow NH_{4}NO_{3} + H_{2}O$

Hence, there will be formation of ammonium nitrate $(NH_{4}NO_{3})$ salt.

5 0

3 years ago

Read 2 more answers

Which statement correctly describe the nucleus of the atom

Elza [17]

Protons,neutrons,electrons

5 0

3 years ago

True or false the si in sih4 does not follow the octet rule because hydrogen is in an unusual oxidation stat

ExtremeBDS [4]

The statement is true. The octet rule refers to the general rule of thumb wherein atoms of main-group elements tend to bond with other atoms in such a way that each atom possesses eight electrons (octet) in their valence shell. They tend to form the same electronic configuration as the noble gases. However, there are some exceptions to this rule. One of which is silane, SiH₄. A hydrogen atom only has 1 valence electron and needs another electron to complete its energy level. This is unlike other atoms, for example, carbon which has 4 valence electrons and needs to form 4 covalent bonds to fill its energy levels. Thus, 4 hydrogen atoms need only 4 more electrons. This is given by the silicon atom which has 4 valence electrons. Therefore, when a silicon atom is bonded to 4 hydrogen atoms, the resulting molecule, SiH₄, is a stable one.

6 0

3 years ago