1. When aqueous solutions of lead (II) nitrate (Pb(NO3)2) and sulfuric acid (H2SO4) react, lead (II) sulfate forms as a precipitate.
Identify the spectator
ions and write a balanced net ionic equation for this reaction.

Which ions combine to form the precipitate? (Be sure to include their ionic
charges. For example, o? or [OH]1- )

Which ions are the spectator ions?

Ageologist determines that a sample of a mineral can't be scratched by a steel nail but can be scratched by a masonry drill bit. based on this information, the sample mineral has to be softer than a. orthoclase. b. fluorite. c. apatite. d. corundum.

Stage in which a typical star has completely stopped fusion

Aglow stick contains a glass vial with chemicals. when the glow stick is bent, the vial breaks and the chemicals react to produce a glow. a science student observes that a glow stick kept in the freezer glows for a longer duration than a glow stick kept at room temperature. what conclusion can be drawn based on the observation? be sure to note the outcome and test variables in the conclusion.