4. Identify items in your life that are made of each type of element: metal, nonmetal, and metalloid. For each item, explain why the properties of that type of element are necessary for the function of that item.

How many moles are there in 2.6 x 10^24 atoms of Calcium? a. 7.0 x 10-24 moles of Ca b. 4.4 moles c. 168.36 moles d ...10 moles

When the water level of a stream or river exceeds its natural banks, it has reached its A. plateau. B. capacity. C. crest. D. flood stage.

Which term describes the substance that forms when two or more different types of atoms chemically combine?

Determine the number of significant figures in 420.0

What is the mass of 2.11 * 1024 sulfur atoms?

What does LeChatelier's principal mean

How many milliliters of a 0.7% stock solution are required to make 2 l of 0.2% solution? how many ml of solvent will be required to carry out the dilution?

What percentage of the naphthalene molecules emitted a photon?

In an endothermic reaction, heat is absorbed from the surroundings. How does this affect entropy? A. The particles in the surroundings move slower and have decreased entropy. B.

The temperature of a sample of liquid water changes from 50°C to 30°C. Which statement best explains the change that must happen at the molecular level? A. The molecules move more quickly and their average kinetic energy increases. B.