1) what is the balanced equation for the reduction of gold ions in water to solid gold. 2) calculate the pH of lemon juice to three significant, with a hydrogen ion concentration of 3.65x 10^ -3 mole dm -3. Show all steps of your calculations and include all correct units.

Ajet plane is speeding down the runway during takeoff. air resistance is not negligible. identify the forces on the jet.

Which statement is true about the model of the electromagnetic spectrum a: it change the frequencies of light. b: it compare wavelengths of light. c: the color of light waves can be changed using the model. d: the intensities of light waves can be decreased using the model.

When can a hypothesis be elevated to the status of a theory? a) when it is validated by an experiment b) when data gathered from an experiment precisely fits predictions c) when it can be proved to be true d) when it meets the test of repeated experimentation