Describe two ways that water moves through earthy atmosphere in the water cycle.

If 5.65 grams of zinc metal react with 21.6 grams of silver nitrate, how many grams of silver metal can be formed and how many grams of the excess reactant will be left over when the reaction is complete? Show all of your work.

List the symblos for the nine matalloids on the periodic table?

The element silver has two naturally occurring isotopes, 107Ag and 109Ag. The atomic mass of 107Ag is 106.905. It makes up 51.82% of naturally occurring silver. The average atomic mass of silver is 107.868 amu.

THe following elements are found in what part of the periodic table Germanium, astatine, tellurium, and arsenic?

The electronegativity value for Mg is 1.2 and the value for O is 3.5. Based on these values, what type of bond is expected for a compound formed between Mg and O?1. pure covalent 2. ionic 3. polar covalent 4. none of these 5. not enough information

The air in an inflated balloon (the system) absorbs 125 J of heat from its proximity to a fire. The balloon expands and does 85 kJ of work. What is the change in internal energy (in kJ) (ΔU) for the system? Round to the nearest whole number.

Is a cytoplasm made of 80 percent of water

Calculate the acid concentration of a sample of acid rain with a ph of 4.20

1. Examine Record A. Use the three basic rules to figure out the ages of the layers. In Chart A, list the layers from youngest to oldest with the youngest layer in the first row.

What are three reasons why a population might change?