A 101 g of an unknown metal at 50 o C is placed in 40 g of water at 25.0 o C (C p for water is 1 cal/g o C). The temperature of the system at equilibrium is 29.7 o C. What is the unknown metal?

In which phase(s) do the molecules take the shape of the container?

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

If e is the symbol for an element, which two of the following symbols represent isotopes of the same element? 1. e2. e3. ea.1 and 2c.1 and 4b.3 and 4d.2 and 3