Which statement is true about a base when it reacts with another substance?
a. it receives a hydrogen ion.
b. it receives a hydroxide ion.
c. it donates a hydrogen ion.
d. it donates a hydroxide ion.

A. It receives a hydrogen ion.

Explanation:

The Bronsted lowry theory of acids and bases solves this problem. The theory states that;

Any compound that can transfer a proton to any other compound is an acid, and the compound that accepts the proton is a base. A proton is a nuclear particle with a unit positive electrical charge; it is represented by the symbol H+ because it constitutes the nucleus of a hydrogen atom.

So among the options, the option that says a base receives a hydrogen ion is the right answer which is option A.

Take the following reaction for example:

HCl  + NH₃    ⇌  NH₄⁺  +  Cl⁻

Hydrochloric acid (HCl) is the Brønsted-Lowry acid because it donates a hydrogen ion. Ammonia (NH3) is the Brønsted-Lowry base because it accepts the hydrogen ion.

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.

your answer is c) plasma

~*"auba14"*~