What happens to the sun's energy as it travels to Earth's atmosphere? A. Some of it is destroyed in Earth's atmosphere.
B. It is completely trapped by Earth's surface.
C. It is all reflected back into space.
D. Some of it reaches Earth's surface.

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)

In salt water solution, the salt is the blank

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?