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What will be the effect, on the mass of the residue, of over heating the hydrate so that the compound decomposes? Will this likely lead to a higher or lower value of x than the actual value?
The radius of a cation (positive ion) isalways than that of the atom from which it is derived. On the other hand, the radius of an anion (negative ion)is always bigger than that of the atom from whi
Examine the IR spectrum of aspirin. Several significant signals have been identified on the spectrum. Assign these signals to corresponding functional groups in the molecule of aspirin.
The affinity for Ag+ for sulfhydryl groups is so great that Ag+ canbe used to titrate -SH groups quantitatively. Just enough AgNO3 wasadded to a 10 mL solution containing 1.0 mg/mL of pure enzyme to
A solution of H2SO4 with unknownconcentration was titrated with the standard base with .0233Molarity. A volume of 5.03mL of the acid solution required 12.07mLof the standard base to reach the end po
How many moles of NaOH were required to neutralize the KHPthat was weighed out and what is the Molariy of the "standard base"using the information obtained from the KHP titration.
A 0.025 M monoprotic weak acid is titrated with a 0.10 M NaOH solution at 25°C and the pH at the half-equivalence point is found to be 2.85. What is the percent ionization of this weak acid at
Suppose you have an aqueous solution contains 158.2 g KOH per liter, its density is 1.13g/cm3. You want to prepare a 0.250 molal solution of KOH, starting with 100.0ml of the orginal solution.
What is the pH at the equivalence point when when 25.0 mL of 0.189mol/L HN3(aq) is titrated with 0.123 mol/L NaOH(aq)?Assume the temperature is 25oC. (For HN3,pKa=4.72 at 25oC).
Explain the difference in the answers to question 2 and question 5. Which is the "correct"value for the concentration of the standard NaOH solution?
How you do you determine is the salt soln is neutral, acidic, or basic? Dont you have to figure out wherethe soln derived from, as in Ba(NO3)2 : BA comes from strong base:BaOH and NO3 comes from ...
A 40 foot aluminum street lighting support is sized and welded intoposition between two very large bridge beams on a hot summer daywhen temperature of the aluminum support is 145 degrees Fahrenheit.
A company wishes to reduce its air conditioning cost by cooling 100cubic feet of a metallic heat sink during the night to -10 degreesCelsius, when electrical cost are lowest.
The energy of a vibrating molecule is quantized much like theenergy of an electron in the hydrogen atom. The energy levels of avibrating molecule are given by the equation.
How many moles of Cl2 must be added to this container to reduce the number of moles of SbCl3 to 0.700 mole atequilibrium?
Two gases are contained in gas bulbs connected by a valve. Gas A ispresent in a 44 L bulb at a pressure of 381 torr. Gas B exerts apressure of 381 torr. Gas B exerts a pressure of 756 torr in a 79
A bicycle tire is filled with air to a pressure of 720 torr at atemperature of 19 degrees Celsius. Riding the bike on asphalt on ahot day increases the temperature of the tire to 58 degreesCelsius.
A single atomic layer of oxygen atoms (~5x1014 atomscm-2) collects on the surface of a 1 cm2 wafer of silicon. The silicon is thenmelted and all of the oxygen dissolves in it. Upon cooling silicon f
What similar ingredients found in antacids are similar to those ingredients found in Alka-Seltzer? (please be detailed and complete for high rating)
Calculate the number of moles of NO2, F2, andNO2F present after 10 S if 2.00 moles of NO2 are mixed with 3.00moles of F2 in a 400 dm3 vessel at 300K.
What mass of sodium fluoride must be added to 250. mL of a0.100 M HF solution to give a buffer solution having a pH of3.50?
Ammonia gas reacts with oxygen to form nitric oxide gas andstem. The ammonia gas is in a closed 3.00 Liter flask at 1.2 atmconnected to a 2.75 Liter flask containing the oxygen gas at 1.5atm pressur
A quantity of 1.834g of ethanol (C2H5OH) wasburned in a constant-volume bomb calorimeter. Consequently, thetempertature of the water rose by 5.23C.
For a certain gas that contains only carbon and hydrogen the masspercentage of carbon is known to be 85.62. It is alsoknown that 2.58 g of the gas has a volumeof 1.00 L and a pressure of 0.980 atm
EDTA is a very common ligand, which like oxalate, binds to manymetals. However, unlike oxalate, which forms two bonds, EDTA forms6 bonds to the metal.