Find the formula for calcium and oxygen

What are different types of sedimentary rocks?

A 75 gram bar of gold is cut into three equal pieces. How does the density of each piece compare to the density of the original bar? 1. Each piece is 1/3 the density of the original bar 2. Each piece is the same as the density of the original bar

If mercury (II) oxide is heated and decomposes, what would the product of the reaction be? 4HgO → 4 + 2O2

In what ways are polyatomic ions like simple ions

A car is moving on a flat roadway. What can they say about this system?

A student prepared a stock solution by dissolving 2.50 g of KOH in enough water to make 150. mL of solution. She then took 15.0 mL of the stock solution and diluted it with enough water to make water to make 65.0 mL of a final solution.

When substances form liquid solutions, what two factors are involved in determining the solubility of the solute in the solvent? Entry field with incorrect answer The tendency towards randomness drives the solution process.

Rachel has a sample containing 2 moles of carbon. How many atoms of carbon are in this sample? a. 2.044 * 1023 atoms b. 6.022 * 2023 atoms c. 1.204 * 1024 atoms d. 6.022 * 1046 atoms

Atoms of which element have the greatest tendency to gain electrons? (1) bromine (3) fluorine (2) chlorine (4) iodine

Technetium-99 is used for brain scans. If a Laboratory receives a shipment of 200 g of this isotope, how much will remain after 24 hours? The Half-Life of Technetium-99 is 6 hours.