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aleksandrvk [35]
3 years ago
10

What is a substance that reduces the amount of activation energy in a chemical reaction called?

Chemistry
2 answers:
astraxan [27]3 years ago
5 0

Answer: Catalyst

Explanation: Catalyst is a substance which enhances the speed of Chemical reaction without consuming in the Reaction and it is regenerated after completion of Reaction and it is reused further cycle of reaction.

So catalyst reduces the activation energy by speed up the reaction

FinnZ [79.3K]3 years ago
3 0

The answer is catalyst

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Abbreviation for mole
Sedbober [7]

Answer:

Maybe mol

Explanation:

6 0
3 years ago
One main difference between a Prokaryotic cell and an Eukaryotic cells is __________.
sasho [114]
The Eukaryotic cell has a nucleus
8 0
3 years ago
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What is the difference between polar and non-polar
ExtremeBDS [4]

Answer:

Polar molecules occur when there is an electronegativity difference between the bonded atoms. Nonpolar molecules occur when electrons are shared equal between atoms of a diatomic molecule or when polar bonds in a larger molecule cancel each other out.

Explanation:

Polar molecules occur when there is an electronegativity difference between the bonded atoms. Nonpolar molecules occur when electrons are shared equal between atoms of a diatomic molecule or when polar bonds in a larger molecule cancel each other out.

5 0
3 years ago
A certain liquid has a vapor pressure of 92.0 Torr at 23.0 °C and 351.0 Torr at 45.0 °C. Calculate the value of ΔH°vap for this
notka56 [123]
There is a specific formula to use for these type of problems. 

ln (P2/ P1)= Δvap/ R x (1/T1 - 1/T2)

R= 8.314
P1= 92.0 torr
T1= 23 C + 273= 296 K
P2= 351.0 torr
T2= 45.0 C + 273= 318 K

plug the values and solve for the unknown

ln( 351.0/ 92.0)= Δvap/ 8.314 x (1/296 - 1/318)

Δvap= 47630.6 joules

3 0
3 years ago
Read 2 more answers
What type of reaction is shown below? <br> Ca + 2H2O - Ca(OH)2 + H2
krek1111 [17]
A + BC  ---> AB + C
So here one reactant (A) is accepting a group which is being given by another compound (BC) however the A is not giving any group / element or ion
So this single displacement
Similarly in the given reaction
the anion OH- is only being replaced
The element Ca accepts OH- and H2O loses the same group to form new element H2
So the correct answer is
Single replacement also known as single displacement.
5 0
3 years ago
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