Answer: (A) It appears as a reactant in the net chemical reaction
Explanation:
A catalyst is A substance that speed up the chemical reaction without its self being consumed in the reactants or the products.It does this by lowering the activation energy of the reaction by speeding up the rate of reaction.
Answer:
n = 6.06 x 
mol
Explanation:
n =?
m = 3.06 x 10-³ g
M (H5) = 5 x 1.01 (Since we only want hydrogen)
Atomic mass of C = 12.01
Atomic mass of H is 1,01, etc.
Having this data, we can use the Molar mass formula and change it so we can know the quantity of matter (n) in moles, and we just replace it.
M = 
⇔ n = 
⇔ n = 
⇔ n = 6.06 x mol
Note: The numbers I've used may be different from yours, by a small difference. I don't know if it's the case, but hope it helped.
Physical change
brainliest pls
Answer:
Bronsted-Lowry acid and base
Explanation:
The definition of Bronsted-Lowry for a compound is in its ability to deal with any solvent, such as ammonia or sulfuric acid, through acids and bases in pairs, called conjugated acid-base.
A Bronsted-Lowry base is any species capable of <u>accepting a hydrogen proton</u>, which requires a pair of free electrons to form the bond with the H⁺ proton, whereas a Bronsted-Lowry acid is a species capable of <u>donating an H⁺</u>.
Thus, the conjugated base of a Bronsted-Lowry acid is the species formed after that acid donates a proton. The conjugated acid of a Bronsted-Lowry base is the species formed after that base accepts a proton.
The two species in an acid-base conjugate pair have the same molecular formula, except that the acid has an extra H⁺ compared to the conjugated base.
