There will be no difference in the mass of pre- and post-82 pennies when reacted with hydrochloric acid.
Based on the data, the null hypothesis should be rejected. The null hypothesis stated, that there would be no difference in the mass of pre and post-82 pennies when reacted with hydrochloric acid. An alternative hypothesis could be that the mass of the pre-1982 penny would be more than the mass of the post-1982 penny. As the data shows, the pre-1982 penny lost very little mass when compared with the post-1982 penny. EXPLAIN THIS SCIENTIFICALLY!!!
- Reaction between HCl and Cu vs. HCl and Zn.
- Chemical properties