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What is the ionic strength of a buffer?
Is a molecule always charged or uncharged?
If given the pKa of succinicacid (4.19) is it protonated or unprotonated?
a 21.496-g sample of Magnesium is burned in air to form Magnesium Oxide and magnesium nitride. When the products are treated with water, 2.813-g of ammonia gas are generated. Calculate the amounts of magnesium nitride and magnesium oxide formed.
Calculate the molar mass that would be obtained from the actual experimental data under the following conditions. The unknown is methyl propyl ether (CH3OC3H7)
A sculptor has prepared a mold for casting a bronze figure. The figure has a volume of 225 mL. If bronze has a density of 7.8 g/mL
a mass of 48.5 g of a certain substanse can be disolved in 29.1 cm3 of water at 20 degrees celcius. calculate the
The approximate distance between mars and earth is about 1.29 x 10^8 miles. How many seconds would it take for TV pictures transmitted from the viking space vehicle on mar's surface to reach earth ? enter your answer in scientific notation
0.10 gram sample of a gas occupies 47 ml of vol at 25 deg C and 755 mm Hg. What's the FW of the compound?
What observed rotation is expected when 1.26M solution of (R)-2-butanol is mixed with an equal volume of a 0.630 M solution of racemic 2-butanol, and the resulting solution is analyzed in a sampling container that is 1 dm long
The reactions represented below are all spoontaneous as written. For each, write the anode and cathode half - reactions and indicate the signs of the electrodes.
Suppose you have a sample of sodium weighing 11.42 g. How many atoms of sodium are present in the sample.
Esters can be hydrolyzed when heated with water and strong acids or bases- the reverse of Fischer esterification. However, whereas Fischer esterification is reversible, ester hydrolysis when carried out in aqueous base is not. This is because
How did Regan cutting exploration of renewable energies have a long-term impact on our ability to remove our dependence on oil?
How much PV work is done, and what is the value of ΔE for the reaction of .50 mol of H2 with .25 mol of O2 at atmpospheric pressure if the volume change is -5.6L
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