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| Questions:
TimeLeft: Posted: |
Chemistry
why can't the phosphate group have 3 bond?
(because it have 3 negative charge.) more... |
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Aug 14th |
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Three unknown acid solutions are labeled A, B, and C. One is sulfuric acid, one is hydrochloric acid, and the other is nitric acid. Each has a concent more... |
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Jul 19th |
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A sample of H2o with a mass 46.0grams has a tempature of -58.0 celsius how joules of energy are necessary to melt 46.0 grams of ice. Use 2.1 joules ce more... |
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Jun 26th |
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1. The threshold/NOEL level found for a particular chemical from animal studies is 0.003 mg/kg body weight per day. The only source for the chemical i more... |
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Jun 1st |
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Just a real quickie. If I am titrating NaOh into a solution of vinegar what would happen if I added more water to the vinegar? would I need more or le more... |
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May 25th |
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Initially the concentrations og N2 and O2 are both 1.8M, respectivily, and the is no NO. If at eqiulibrium the concentration of NO is 1.8M, find Keq. more... |
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May 17th |
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At what temperature will 6.21 g of oxygen gas exert a pressure of 5.00 atm in a 10.0-L container? more... |
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Apr 12th |
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A solution is prepared by placing 72.8 g of calcium chloride in 120 g of water at 22C. The vapor pressure of water at 22C is 2.6 kPa. a)What is the bo more... |
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Apr 8th |
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Balance this word equation: zinc +hydrochloric acid yields zinc chloride + hydrogen more... |
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Mar 22nd |
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a sample of helium has a volume of 325mL and a pressure of 655mmHg. What will be the pressure if the helium is compressed to 125mL more... |
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Mar 4th |
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A reaction in which gas, a solid precipitate, or a molecular compound forms from the apparent exchange of atoms or ions between two compounds? more... |
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Mar 2nd |
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What is the energy released when a chemical compound reacts to produce new compounds? more... |
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Mar 2nd |
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A student is trying to determine whether an unknown solid acid is Citric acid (a triprotic acid with the formula H3 C6 H5 O7) or Tartaric acid (a dipr more... |
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Jan 31st |
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for acid HA, the conc of HA and A- are .075 and .025 respectively at pH 6.o calculate the Pka value for the HA more... |
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Jan 21st |
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my science fair experiment is how does soft drink acidty efect brass,aluminum,copper,andiron. i used sprit and today is my fourth day and only the iro more... |
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Dec 27th |
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