The following chemical equation is not balanced: Fe2O3 + H2SO4 Fe2 (SO4) 3 + H2O When this chemical equation is correctly balanced, what is the coefficient of the water molecule?

What determines how a singer is going to sound

At what temperature does water become a gas? a. 0o c b. 32o c c. 100o c d. 212o c

A redox reaction always involves A. a change in oxidation number B. a change in phase c. the transfer of protons D. the formation of ions

Substance A will not dissolve in water. What can be said about substance A

What is the overall charge of the NaCl molecule?

What functional groups of the emulsifying agent provide the hydrophilic character? Do these groups affect the pH?

Which element has atoms that can form single, double, and triplecovalent bonds with other atoms of the same element? (1) hydrogen (3) fluorine (2) oxygen (4) carbon

Which of the following statements best describes the basic structure of an atom? Electrons and protons are in motion around a nucleus that contains neutrons Neutrons are in motion around a nucleus that contains protons and electrons Protons are in

Which of the following elements is released into the atmosphere by all of these processes: volcanic outgassing, animal respiration and flatulence, burning of fossil fuels, and metamorphism of limestone? a. Carbon. b. Nitrogen. c. Oxygen. d. Sulfur

A phase change from a solid to a gas is called what