What is the conjugate acid of the Brønsted-Lowry base, CH₃NH₂?

The conjugate acid is the CH₃NH₃⁺ (methylammonium)

Explanation:

As every, Bronsted Lowry base the methylamine can accept a proton to water to become, methylammonium.

This is the reaction, where the water is the acid, the methylamine is the weak base and the conjugate base is the hydroxides, while the  methylammonium is the conjugate strong acid.

We say that is strong, because it can react to water, to make hydrolisis so, we can get methylamine again.

CH₃NH₂ + H₂O  ⇄   CH₃NH₃⁺ + OH⁻        Kb

Reaction for the strong conjugate acid

CH₃NH₃⁺  +  H₂O ⇄  CH₃NH₂  +  H₃O⁺      Ka

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.