what are three covalents objects that can be found in a classroom sink?
117316
soap (long alkyl chains with carboxylate salts at the end)\n\nwater\n\nIf the sink has any rubber components, rubber is a polymer of carbon-carbon (as well as other) bonds.
1075772
the covalent reaction it undergoes is a dehydration reaction
7695
The monomers are linked by covalent chemical bonds.
263670
Hmmm... judging by your interest in cleaning products and dishwashing detergents, I'm guessing you're in that industry or just a student looking for some answers for a project.\n\n-Insufficient data - \nAre you referring to dishwater in a more sterile kitchen or a dirty restaurant?  Is the piping clean or are we talking rusty piping?  Filtered water or non filtered water? Hmmm... so, at STP you want to figure out this. \n\nHere's what you would need.  First figure out the type of microbes that would typically exist in your sink.  Or if you don't have one, get some kind of bacteria.  Take the whole thing, perform your experiment.  Take some water samples.  Finally, send the water samples to a lab immediately for a count.  You could get a concentration of microbes per given volume.  My advice -- it's all I can do.
1071756
Wet chemistry is your typical lab-bench type stuff like in high school and freshman chem: mixing reagents in solution, reactions in solution, etc.
284671
try these sites\nhttp://www.ric.edu/ptiskus/chemical/\nhttp://www.schools.utah.gov/curr/science/sciber00/8th/matter/sciber/chemchng.htm\nhttp://www.iit.edu/~smile/ch9613.html
1090418
Search through the wastewater links at \nhttp://www.itt.edu/staff/boyter/links/index.html#WASTEWATER
789020
moisture\nsoap\ntoner\ncleanser\nvitamins
201939
a.)ionic b.)covalent c.)covalent d.)metallic
121623
Walk over to the science lab and ask one of the professors, or if you are a middle school student, ask one of the teachers.  I am assuming this is for a legal purpose of course.
749646
Try doing a Google search under the Hall or the Hall-Heroult process.    That or check out a General or an Inorganic Chemistry book from the library.  That's a good launch point.
971648
calcium carbonate.\nCaCO3
64690
NA2SO4,KOH,AGCL,CA(NO3)2 ARE SOLUBLE.AND HG2BR2 AND CDS IS INSOLUBLE.
335753
1. Covalent Bonds\n2. Ionic Bonds\n3. Hydrogen Bonds
708449
a=oxygen diflouride\nb=dichlorine octoxide\nc= sulfur trioxide\nd=phosphorus pentoxide
631569
Procrastination makes science projects much more exciting! Suggest that you go with something that can be done at home with easily available products in a relatively quick time period. A perennial favorite is: Which paper towel is stronger when wet? Get a bunch of paper towels of various brands and a bunch of marbles or coins to use as weights. See which paper towel can hold the most weight. You need to rig up something to hold the paper towels while you keep adding the marbles or you'll need extra hands to hold the sheet. See the link below for one way of doing it. Like I said, this is a perennial favorite because it's cheap and easy. It may not get a prize, but it will get you through. Hopefully you have a digital camera to get pictures to put on the display board. Good luck. (I've raised four kids with more science projects than I care to remember.)
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Matchstick heads. Although they are combined with Sulfur as P4S3 and other compounds.\n\nYou can get them at a local chemist's too.