More acid = more rapid reaction, so a and c are out. Powdered zinc has more surface area than a single lump of it. More surface area means more is exposed to the reaction, and you get a faster reaction. The answer is B. Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions here.
The rate of reaction increases with increase in temperature, increase in concentration of the reactant and increase in surface area. Powered Zn has a greater surface area than a lump of Zn. Also 40°C is a higher temperature than 25°C. Furthermore, 2 M HCl is a more concentrated acid than 1 M HCl. Considering the above three factors powdered Zn in 2.0 M HCl at 40°C will react the fastest.
If you're indoors, stay inside. If you're outside, stay outside. If you're indoors, stand against a wall near the center of the building, stand in a doorway, or crawl under heavy furniture (a desk or table). Stay away from windows and outside doors.
In physics, motion means a continuous change in the position of a body relative to a reference point, as measured by a particular observer in a particular frame of reference.
