Suppose you were producing zinc chloride by the reaction, zn + 2 hc1 > znc12 + h2 if you started with 4 molecules of zinc, you would need of hydrogen chloride and you would produce molecules of zinc chloride.

Aball thrown by ginger is moving upward through the air. diagram a shows a box with a downward arrow. diagram b shows a box with an upward arrow. diagram c shows a box with a downward and upward arrow equal in size. diagram d shows a box with a downward and upward arrow with the downward arrow larger in size. which force diagram represents the forces on the ball? you may neglect the effects of air resistance.