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It took 22.02 0.05mL of a sodium hydroxide solution to titrate a 0.4315 g sample of KHP. Compute the concentration and uncertainty in the concentration of the sodium hydroxide solution. Abandon any uncertainty in the mass.
one type of electromagnetic radiation has a frequency of 107.1 MHz another type has a wavelength of 2.12*10^-10m,and another type ofelectromagnetic radiation has photons with energy equal to 3.97*10^-19J/photon. identify each type of electromagnet..
Recognizing that both meso- and dl- forms of hydrobenzoin are optically inactive. what fundamental experimental approach can be employed to distinguish
How many molecules of carbon dioxide will be formed if 4.89 g of propane, C3H8, is burned with excess oxygen. Correct Answer : 2.00 × 1023 molecules
Air at 25°C and 100 kPa has a dew point of 16°C. If you want to remove 50% of the initial moisture in the air (at a constant pressure of 100 kPa), to what temperature should you cool the air
in the resonance form caused by the delocalization of the immediately adjacent Nitrogen's lone pairs, there is a pi bond.
Work function of chromium metal is 4.37 eV. What is the wavelength of radiation that must be supplied to metallic chromium to release and electron with kinetic energy of 2.05*10^-18 J
a solution contining agno3 is mixed with a solution of nacl to form a solution that is 0.10 m in agno3 and 0.075 m
A gas bottle contains .65 mol of gas at 730 Hg pressure. If the final pressure is 1.15 atm, how many moles of gas were added to the bottle?
one compound contains 80.78 c 13.56 h and 5.66 of. a solution of 1.03g of this in 7.49g of benzene freezes at 3.01
A stainless steel spoon weighs 25.2 g and is at a temperature of 18.5 oC. It is immersed in 81.7 mL of hot coffee (T = 84.0 oC) in a Thermos flask.
calculate the concentration of calcium ion (in mg/L -1) in the water (25C). What assumptions are made in carrying out the calculation?
Organic chemists when making a new solid compound often first try ethanol as a recrystallizing solvent. If soluble at room temperature, they add water and this often works. why
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