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a) what temperature change would you expect in which 50.0 mL of 2.0M HCl is combined with 80.0 mL of 2.0 M NaoH in calorimeter with a heat capacity of 10J/gC? Show your work.
b) Citric acid, can be obtained from lemon juice contains C, H, and O. It is 37.5% Carbon and 4.17% hydrogen by mass. Citric acid has three acidic hydrogens per molecule. A 0.250g sample of citric acid dissolved in 25.0 mL of water requires 37.20 mL of 0.105 M NaOH for complete neutralization. What is the molecular formula of citric acid?
460. mL of hydrochloric acid (HCl) acid is exactly neutralized with 485 mL 0.660 M NaOH solution. What is the concentration of the acid solution.
Describe the preparation of a 1.50 M, pH 8.0 tris buffer (500 mL) using tris base (MW= 121.1 g/mol) and 3.0 M HCl. pKa of tris is 8.3
A balloon is inflated to a volume of 8.3 L on a day when the atmospheric pressure is 652 mm Hg. The next day, as a storm front arrives, the atmospheric pressure drops to 620 mm Hg
Calculate the wavelength of the photon emitted when an electron makes a transition from n=4 to n=3
The minimum frequency of light needed to eject electrons from a metal is called the threshold frequency, ?0. Find the minimum energy needed to eject electrons from a metal with a threshold frequency of 5.73 × 10^14 s-1.
Ethane is burned with 20% excess air in a furnace operating at a pressure of 100 kPa. Assume complete combustion occurs.
Calculate the partial pressure of water at 23.6 Celsius by interpolation from the vapor pressure table.
Draw a detailed mechanism for the FeBr3-catalyzed reaction of the ethylbenzene with bromine, and show why the sigma complex (and the transition state leading to it) is lower in energy for substitution at the ortho and para position than it is for ..
What would happen if bezaldehyde react with a high (50%) concentration of sodium hydroxide in the absence of acetone via aldol condensation
ammonia undergoes autoionization by the transfer of a proton: 2NH3 NH4+ + NH2-, K = 1×10^-33 at -50°C Since ammonia is better proton acceptor than water, the ionization of acids is relatively enhanced in liquid ammonia. For example, acetic acid i..
write Lewis structure for Oxygen difluoride, OF2. How many lone pairs are one the oxygen atom
Carbon monoxide detectors sound an alarm when peak levels of carbon monoxide reach 100 parts per million (ppm). This level roughly corresponds to a composition of air that contains 400,000 micrograms per cubic meter of air.
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