A 500-kg elevator is raised to a height of 10 min 10 seconds. Calculate the power of the motor.

490,000 W

49,000 W

4900 W

490 W

Which statement describes how hail is formed? Ice crystals collect on the rain drops, forming large chunks of ice. Liquid water freezes on solid precipitation in layers, creating large chunks of ice.

Why do the number of atoms of each element have to be the same on both sides of the equation?

What us the conversation of mass

How many atoms are in 159 g of calcium? 159 g =

Why was methyl red used as an indicator in this experiment rather than phenolphthalein?

How much greater is the energy produced by a fusion reaction compared to a chemical reaction?

True or false. A bond between a metal atom and a nonmetal atom is likely an iconic bond

What is a precipitate? It is a liquid that forms from solution during a chemical reaction. It is a reactant that forms from solution during a chemical reaction. It is a solid that forms from solution during a chemical reaction.

The electron configuration for an atom is 1s22s22p2. How many electrons does the atom have? 4 2 6 5

When a piece of sodium carbonate reacts with dilute HCl, a gas X is produced. When gas X is passed through lime water then the solution turns milky and a white precipitate Y is formed a. Write the chemical formula of X, Y and (3) b.