An impure sample of zinc (zn) is treated with an excess of sulfuric acid (h2so4) to form zinc sulfate (znso4) and molecular hydrogen (h2). (a) write a balanced equation for the reaction.

The density of the solid phase of a substance is 0.90 g/cm3 and the density of the liquid phase is 1.0 g/cm3. a large increase in pressure will a. lower the freezing point b. raise the freezing point c. lower the boiling point d. raise the triple point e. lower the triple point

If c + di is a point on the circle, then | c + di |=

Can you guys answer these questions i need it before 1: 00pm