Experiment 3 Questions
1.
From the results of the solubility test, the identity of your unknown can be
placed into one of two groups, soluble or insoluble. In fact, this test allows
you to narrow down the list of potential unknowns even further. Describe
how the solubility test can be used by a clever observer to separate the
liquids in Table 1 into three different groups rather than just two.

Different isotopes indicate that an element will have different numbers of

Acompound contains c, h, and o atoms. when 1.130 g of the compound is burned in oxygen, 1.064 g co2 and 0.3631 g h2o are produced. what is the empirical formula of this compound?

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.)