According to the equation for this chemical reaction, what does the 2 in front of 2ag tell us?

Which of the following pairs of elements belong to the same groupa. h and he b. li and bec. c and pb d. ga and ge

How many atoms or molecules are there in a mole of a substance?

A2-kg bowling ball is 1 meter off the ground on a post when it falls. just before it reaches the ground,its traveling 4.4 m/s. assuming that there is no air resistant, which statement is true a. the initial potential energy is less then the final kinetic energy b. the mechanical energy is not conserved c. the mechanical energy is conserved d. the initial potential energy is greater than the final kinetic energy