What happens to the particles of substances when a chemical change occurs.

If 7.36 g of sodium metal react, how many grams of sodium hydroxide can be produced

Show ur working: What mass of sulfur trioxide is formed from 96g of sulfur dioxide? 2 SO2+O2 - > 2 SO3

Energy that comes from the heat of the earth's core is known as: solar energy hydro energy geothermal energy wave energy

A chemist must dilute 34.3mL of 1.72mM aqueous calcium sulfate solution until the concentration falls to 1.00mM. He'll do this by adding distilled water to the solution until it reaches a certain final volume.

Consider the following reaction: NH4HS (s) ⇌NH3 (g) + H2S (g) An equilibrium mixture of this reaction at a certain temperature was found to have [NH3] = 0.276 M and [H2S] = 0.370 M.

Sarah is ordering cheese pizza for a party of ten people she knows each pizza has 8 slices to figure out how many pizzas to order sarah needs to know the

How many grams of sodium ions are in na2so4?

Electron configuration for iron?

Explain how melting is considered endothermic

In the process of covalent bonding, atoms share electrons. This means that * a) Electrons from each atom are attracted to the nucleus of both atoms b) Protons and neutrons attract c) Atoms lose electrons and become ions d) Atoms gain electrons and