1) when litmus paper is dipped into a acid solution, the litmus paper turns red.
<span>2) acid reacts with metals to produce hydrogen gas </span>
<span>3) the equation of an acidic substance begins with the letter 'H' such as HCl </span>
B. It is not accelerating since equal and opposite forces cancel each other. Hope it helps
Calcium will form ions with a charge of +2