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Calculate the pH after 15.0 mL of 0.40M HCL is added to 20.0 mL of 0.50 M NH3 (Kb NH3= 1.8 x 10^-5)
Calculate the pH after 10.0 mL of 0.40 M NaOH is added to 20.0 mL of 0.50 M HCl
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The compound As2I4 is synthesized by reaction of arsenic metal with arsenic triiodide. If a solid cubic block of arsenic (d 5.72 g/cm3) that is 3.03 cm on edge is allowed to react
As a technician in a large pharmaceutical research firm, you need to produce 450. of 1.00 potassium phosphate buffer solution of = 7.38. The of is 7.21. You have the following supplies: 2.00 of 1.00 stock solution
CaCN2 + 3 H2O → CaCO3 + 2 NH3 . How much CaCO3 is produced if 47.5 moles NH3 are produced?
The lipid formed an emulsion when mixed with oil and water, reacted with aqueous sodium hydroxide to form soap, did not react with bromine, and gave a positive result for the ammonium molybdate test. Describe a lipid structure consistent with thes..
Calculate the mean and standard deviation of w/v percentage of acetic acid and the 95% confidence interval for the mean. Calcium in a mineral was analyzed five times by each of two methods
A solution is made up by dissolving 73 g of glucose in 966 g of water. Calculate the activity coefficient of glucose in this solution if the solution freezes at -.66 degrees C.
A 27.0-gram sample of an unknown hydrocarbon was burned in excess oxygen to form 88.0 grams of carbon dioxide and 27.0 grams of water. What is a possible molecular formula of the hydrocarbon?
If 18.2 mL of 0.800 M HCl solution are needed to neutralize 5.00 mL of a household ammonia solution, what is the molar concentration of the ammonia.
CO(g) + 2H2(g) = CH3OH(g) , what is the equilibrium constant? , where CH3OH = 0.0412 atm, H2 = 0.274 atm, CO = 0.914 atm.
20.00mL of radiator liquid, ethylene glycol has a mass of 20.85 g. What is the density of the liquid?
Chemical Structure and Hydrogen Bonds in Base Pairs, Draw the chemical structure of a correctly base paired G-C pair, then re-draw the pair with a propeller twist these answers should all be on one page following box 'G'
Describe a situation where a substance changed between the solid and liquid states or between liquid and gas states? Can you describe an example of when a substance changed between the gas and solid states? Let's see how many different examples we..
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