Bundance 2.23
Calculate the atomic mass of the element X. Then use
the periodic table to identify the element. Show all
your work.
4.67
3.10
hellppp ple

How will the emission of an alpha particle affect the atomic number of an atom

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.)

How many moles of bromine are needed to produce 3.23 moles of potassium bromide