Question

please help brother and sister ​

Answer 1

Answer:

define

1.acid: substance with particular chemical properties including turning litmus red, neutralizing alkalis, and dissolving some metals; typically, a corrosive or sour-tasting liquid of this kind.

2.respiration: the act or process of breathing : the inhaling of oxygen and the exhaling of carbon dioxide

Answer 2

Answer:

Define:

1. Acid: Substance with particular chemical properties including turning litmus red, neutralising alkalis, and dissolving some metals; typically, a corrosive or sour-tasting liquid of this kind.

2. Respiration: The act of process of breathing: the inhaling of oxygen and the exhaling of carbon dioxide.