6. Demonstrate learning: Choose an interesting reaction in the Gizmo. Use the available tools to make observations, and use what you have leamed so far to draw conclusions about the reaction Describe your
findings below
Reaction
Findings

Using data from seismic waves, geologists have learned that earth’s interior is made up of several

Joan writes four numbers on the board in standard form, and then she writes their scientific notation

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.)