Answer:
A. a magnet
Explanation:
Iron fillings could be separated from sand using a magnet
Answer:
All the individuals of a species living within a specific area are collectively called a population.
Explanation:
According to Bronsted theory of acid and base, an acid in a proton donor while base is a proton acceptor. Acid donates the proton to form conjugate base, while base accepts proton to form corresponding conjugate acid.
For the reaction,
<span>hpo2− 4 (aq) + hno3(aq) </span>⇔<span> no− 3 (aq) + h2po− 4 (aq)
In above forward reaction, hno3 donotes proton to form no-3, hence no-3 is a conjugate base. </span>
Negative 2
Each electron contributes a minus one charge.
