The center of this seesaw is used to balance the board with the seats. The children can easily move up and down without much force. the seesaw is an example of wich simple machine?

What is the purpose of cell wall

The formation of covalent bonds is ...

Lithium (Li) is higher than iron (Fe) on the activity series. What does this mean? A. Li will replace Fe in a combination reaction. B. Fe will replace Li in a single-replacement reaction. C. Li will replace Fe in a single-replacement reaction. D.

Sulfur trioxide, so3, is made industrially in enormous quantities by combining oxygen and sulfur dioxide, so2. what amount (moles) of so3 is represented by 3.00 kg of sulfur trioxide?

Which of these substances are compounds? How do you know? A. Salt (NaCl) B. Nitrogen (N) C. Helium (He) D. Water (H2O)

The following diagram represents a vertical cross section of sedimentary rock layers that have not been overturned. Which principle best supports the conclusion that these layers have undergone extensive movement since deposition?

What kind of ions do a sodium atom and a chlorine atom become when a valence electron is transferred from one to the other?

NaOH and bleach have several characteristics in common. They include all BUT one of the characteristics listed.

What is the general form for the simplest type of acid-base reaction?

Which element has a larger atomic radius than sulfur? chlorine cadmium fluorine oxygen