Null Hypo:
There will be no difference in the mass of pre- and post-82 pennies when reacted with hydrochloric acid.

Conclusion:
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

Non-profit Tax ID # 203478467