The number of dots around an element symbol in a lewis dot structure equals the total number of electrons in an atom of that element. true false

How has earth changed during our masses era?

Which of the following is a homogeneous mixture? beef stew soil sand and water salt water

If 10.00 mL of a 0.250 M NaCI solution is diluted to 500.00 mL, what is the concentration of the diluted solution

Which of the following Period 4 elements would be most li form a cation? A. K (IE, = 419 kJ/mol) B. Ge (IE, = 762 kJ/mol) C. Br (IE, = 1140 kJ/mol) D. Kr (IE, = 1351 kJ/mol

The lock-and-key model and the induced-fit model are two models of enzyme action explaining both the specificity and the catalytic activity of enzymes. Following are several statements concerning enzyme and substrate interaction.

The total solute concentration of a red blood cell is about 2%. Sucrose cannot pass through a red blood cell's plasma membrane, but water and urea can. Which of the following solutions will cause a red blood cell to shrink? a.

A geologist discovered fossils of marine animals in a layer of sedimentary rock in the desert. Based on this discovery, what conclusion can the geologist draw?

How do metals form chemical bonds with other metals?

Maple syrup has a density of 1.325 g/ml, and 100.00 g of maple syrup contains 67 mg of calcium in the form of ca2 + ions. what is the molarity of calcium in maple syrup?

When an object is lifted 6 meters off the ground, it gains a certain amount of potential energy. If the same object is lifted 18 meters off the ground, its potential energy is A. six times as much. B. the same. C. three times as much. D.