What is the number of valence electrons in potassium?

What is the percent composition ca (oh) 2

A room has dimensions 10.0m x 8.80m x 2.80m. What is the volume of this room in L?

What structure holds the sister chromatids to the spindle fibers? a. kinetochore b. chromatin c. mpf d. cyclin e. centromere

An aluminum engine block has a volume of 4.61 L and a mass of 12.72 kg. What is the density of the aluminum in grams per cubic centimeter?

During chemistry lab, Mrs. Black's students placed an antacid tablet in a zip lock bag. They recorded the mass of the tablet in the bag. Then they carefully added 50 grams of water and quickly sealed the bag.

Materials with small, connected pores are a. impermeable c. unsaturated b. permeable d. saturated

Which of the following work by Robert Hooke most likely impacted later scientists who developed the theory that all organisms are made of cells? a.

Who first established the heliocentric view

If measurements of a gas are 75l and 300 kilopascals and then the gas is measured a second Time and found to be 50L describe what had to happen to the pressure

The neritic zone is also called the: a. Intertidal zone c. Eutrophic zone b. Bathyal zone d. Subtidal zone