Although no blueprints of the pyramids have been found, what evidence suggests humans, not aliens, built the pyramids? remains of large work horses
an ancient rock quarry
advanced forms of technology
wheeled wooden carts

What is the relation between concentration of reactants and the rate of chemical reaction?

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?

Among the elements of the main group the first ionization energy increases