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Explain which of the following species has the weakest N-to-O covalent bond: HONO, NO2-, NO2, N2O, NO3-
Calculate the number of grams of glucose must be dissolved in water in order to produce 100.0 ml of a 3.700 M glucose solution (C6H12O6). Density = 2.601
Write the Henderson-Hasselbalch equation for a solution of propanoic acid (CH3CH2CO2H, pKa = 4.874 ) using HA and A- in the expression. Using this equation, calculate the quotient [A-]/[HA] at A) pH 4.56 B) pH 4.874 C) pH 5.40.
a 0.573g sample of nonvolatile solute is added to 15.6g of naphthalene and the mixture warmed until melted. the
If the temperature and pressure are kept constant during the process, how many liters of chlorine must be with titanium to produce
As space exploration increases, means of communication between humans and other planets are being developed
Calculate the mass percent composition of carbon in each the following carbon compounds. Express your answer using 4 significant figures. C4H10 C6H10 C8H13O5N
physical properties of diethyl ether c2h52o are given as .deltahdeg fusion 7.66 kjmol melting point -116.0degc
a scuba diver with a lung capacity of 5.1 l inhales a lungful of air at a depth of 44 m and a pressure of 5.4 atm.if
A 59.0-g sample of an alloy at 93.0°C is placed into 264 g of water at 22.0°C in an insulated coffee cup. Assume that no heat is absorbed by the cup.
What volume of 0.100 M NaOH is needed to make 100.0 mL of a buffer solution with a pH of 6.00 if one starts with 50.0 mL of 0.100 M potassium hydrogen phthalate?
22.4 liters of a gas weighs 70g at S.T.P. Calculate the weight of the gas if it occupies a volume of 20 liters at 27C and 700mm Hg of pressure
methyl benzoate is an ester which is synthesised from benzoic acid methanol and sulfuric acid. methyl benzoate has a
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