Which is a chemical change? a. ice melting b. ice being carved c. water boiling d. water breaking down into hydrogen and oxygen

If 90.0 grams of ethane reacted with excess chlorine, how many grams of dicarbon hexachloride would form

For each of the following compounds, write the formula then predict whether it would be a strong, weak, or non-electrolyte when placed in di water. for the ionic compounds only, put (s) or (aq) after the forrmula formula strong, weak or non electrolyte? a calcium hydroxide b. silver carbonate c. lead(ii) sulfate d. phosphorus trifluoride e. sodium phosphide f barium sulfate g. strontium acetate h. zinc nitrate

The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false