Answer:
The periods of the periodic table are the horizontal rows.
Explanation:
Answer:
C. NH₃
Explanation:
This buffer is formed by a weak base (NH₃) and its conjugate acid (NH₄⁺) which comes from the salt NH₄Cl. When an acid is added (hydrobromic acid) it is neutralized by the basic component of the buffer, according to the following equation.
NH₃(aq) + HBr(aq) ⇄ NH₄⁺(aq) + Br⁻(aq)
When the ambient pressure is reduced to below the vapor pressure of the liquid, the liquid boils. Water typically boils at 100°C when the pressure is equal to 1 atm, but when the pressure is reduced using a vacuum pump, the water boils at room temperature.