To change the energy in a substance, you must change what?

Temperature

Solid

Volume

Density

Which phrase correctly describes the outer shell of electrons of each atom in most covalent compounds? A. often the outer shells has eight electrons B. an unstable arrangement of electrons exists for each atom C.

How many moles of C12H22O11C12H22O11are needed to prepare 2.50 L of 0.300 M solution?

3. I bought 4 quarts of milk at the store. How mariy mL is that?

20cm³ of methane burns in excess oxygen. a) what is the volume of oxygen required for this reaction?

Is putting popsicle molds in the fridge a physical or a chemical change? Explain why?

How many moles of co2 are produced when 10 mol of propane (c3h8) is burned in excess oxygen?

Why are the spheres representing nitrogen and oxygen different colors

How many moles are in 16.94g of water?

Two compound samples are found to have the same mass percentages of the same elements. what can you conclude about the two samples

Sodium hypochlorite (Na xCl yO z) is the active ingredient in household bleach. A 250.0 g sample of sodium hypochlorite contains 77.2 g sodium, 119.1 g chlorine, and the remainder is oxygen. Calculate the empirical formula of sodium hypochlorite.