What is the experimental empirical formula of zinc chloride?
Determine the simplest whole number ratio of moles of zinc used, to moles of chlorine reacted in the zinc chloride that was produced.
(Take your answers to #4 and #5, and divide both values by whatever value is smaller.) (20 points) .0275/.026 = 1.1 .026/.026 = 1 1:1 ratio of zinc : chlorine Zn Cl = experimental empirical formula 6.
Determine the actual empirical formula of zinc chloride, based on the ionic charges of zinc and chloride ions, using your rules for ionic nomenclature.
Net on Radioactive Lenses (gamma levels..) Radioactive Fed-5s (slight..) Radioactive Optics Posting (WJM) Radioactive Pentax Lens (GM tube sound file..) Romancing the Rare Earths On Enhancing Filters by Howard Ross U. Govt Surplus "Hot" Cameras and Lenses You will find two kinds of radioactive lenses - those that were contaminated and sold as government surplus, and those that are naturally "hot" or radioactive due to the radioactive elements or radioactive impurities used in their manufacture. I am assuming that heavily contaminated and radioactive government surplus items end up in government low level radioactive waste land-fills or other burial sites.
If you want to buy some slightly radioactive lenses and cameras, the U. So if your government surplus bargain camera or lens is contaminated, it is probably only "lightly" contaminated. "Hot" Lenses made from Radioactive Materials Many specialty optical glasses have radioactive elements added to them, either as desired components or as impurities in the mixtures being used.
These slightly radioactive elements such as thorium or rare earth elements such as lanthanum were used to produce desired highly refractive glasses.
Other uses for rare earth elements in photography include color enhancing filters. Ross' Romancing the Rare Earths for a history of enhancing filters and the use of various rare earth elements therein.
Notes: The site still exists, but many of the pages seem to be no longer maintained and available and I have not been able to reach the original site developer, Robert Monaghan, who collected and edited the following information from use net postings.
This was restored from a copy I made in November 2003; Bob may have added to or edited this page after that. Industar 61 lens (lanthanum glass) Lens Faults Pages Photo. Maybe some of those bargains you got on EBAY are "hot" in a different sense than you might have thought!
(20 points) Formula: Mass of zinc chloride produced - mass of zinc used = mass of chloride reacted. Calculate moles of zinc based on original mass of zinc. (20 points) Formula: Mass Zn used x 1 mol Zn = moles of Zn used Molar mass of Zn 1.80 * 1 mol Zn/ 65.39 = .0275 mol Zn 4.