Lead oxide is formed when a lead cation that has a charge of 2 + combines with an oxygen anion that has a charge of 2-. Using the crisscross method, write the formula for lead oxide.

Which statement best describes a weak acid? A. turns blue litmus paper red B. conducts electricity and tastes sour C. partially ionizes and is corrosive to metals D. fully dissociates and establishes an equilibrium in solution

All the members of a certain family of elements are soft, silver-coloured conductors of electricity that react violently with water and form ions with a 1 + charge. The family name for this group of elements is:

Is a compound simply a mixture of two or more elements explain?

O2 would not be considered as a compound. True False

If a liquid is sealed in a container and kept at constant temperature, how does its vapor pressure change over time? It continues to steadily increase. It increases at first, then remains constant. It increases at first, then decreases.

A solution is made by mixing 48.0 ml of ethanol, c2h6o, and 52.0 ml of water. assuming ideal behavior, what is the vapor pressure of the solution at 20 °c?

The molar mass of CO2 is 44.01 g/mole. Choose which of the following correctly represents this relationship correctly as a conversion factor. 1 mol CO2 = 44.01 g CO2 44.01 mol CO2 = 1 g CO2 44.01 molecules CO2 = 1 g CO2 1 molecule CO2 = 44.01 g CO2

For which blocks of elements are outer electrons the same as valence electrons? For which are d electrons often included among valence electrons?

F the solution described in the introduction is cooled to 0 ∘c, what mass of kno3 should crystallize?

11. You run 100 m in 25 s. If you then run the same distance in less time, does your aver - age speed increase or decrease? Explain.