Ronald P.

During photosynthesis, plants use energy from sunlight to form glucose (C6H12O6) and oxygen from carbon dioxide and water. Write a balanced equation for photosynthesis and calculate Hrxn.

At least two different numbers of electron groups can result in a linear molecule. What are they? What are the numbers of bonding groups and lone pairs in each case? Provide an example of a linear molecule in each case.

Consider the reaction:
4 HCl(g) + O2(g)-2 H2O(g) + 2 Cl2(g)

Each molecular diagram represents an initial mixture of the reactants. How many molecules of Cl2 would form from the reaction mixture that produces the greatest amount of products?

Write a balanced chemical equation for the reaction of solid strontium with iodine gas.

The half-life for the radioactive decay of U-238 is 4.5 billion years
and is independent of initial concentration. How long will it take
for 10% of the U-238 atoms in a sample of U-238 to decay? If a
sample of U-238 initially contained 1.5 * 1018 atoms when the
universe was formed 13.8 billion years ago, how many U-238
atoms does it contain today?

Which cations and anions form compounds that are usually soluble? What are the exceptions? Which anions form compounds that are mostly insoluble? What are the exceptions?