calculate the number of water molecules and number of oxygen and hydrogen atoms in a drop of water containing 0.03 mole of water

What semimetal can form four single covalent bonds.

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the independent variable in galileo's experiment? a. the speed of the ball b. the slope of the plane c. whether the ball moved d. what the ball was made of