Chemical bonds are made and broken by:

a. energy changes

c. chemical reactions

b. enzymes

d. catalysts

Determine the standard cell potential (Ecell0) and balanced equation for the voltaic cell: MnO4 - (aq) + I - (aq) → I2 (aq) + Mn2 + (aq) where: MnO4-+5H + (aq) + 5e+→ Mn2 + (aq) + 4H2O (l) : Ered0 = + 1.51V. I2 (s) + 2e-→2I - (aq) : Ered0 = + 0.54 V.

Why does the addition of acid increase the solubility of calcium phosphate?

How is matter classified? chemical properties? physical properties? both a and b? none of the above?

Complete this neutralization equation: H2SO4 + Al (OH) 3

The diagram shows light striking a pane of glass. some of the light is reflected, and some of the light is transmitted. the letters represents six different angles. describe two places where refraction takes place.

Butter is melted in a pan. Which of the following is true about the change? Select one: a. It is a physical change that absorbs energy. b. It is a physical change that releases energy. c.

The freons are a class of compounds containing carbon, chlorine, and fluorine. while they have many valuable uses, they have been shown to be responsible for depletion of the ozone in the upper atmosphere.

Write its complete chemical symbol including mass number, atomic number, and net charge (if any).

How would you be able to use the spectrum of each gas to establish its identity

Which does not add to the reliability of a scientific source of information? displaying data in a colored chart clearly identifying the sources of the data explaining how the data was collected showing that many scientists had reviewed the