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A buffer is made by dissolving HC2H3O2 and NaC2H3O2 in water. Write an equation that shows how this buffer neutralizes added: Acid, Base
Using as sample of gas of 12.0 moles are in a tank of 8.00 Litres at the temperature of 22.6 degree celsius. compute the difference in pressure between CH 4 and an ideal gas under these conditions
Assume that 0.406 mol Carbon (g) is placed in a cylinder that is expanding. The barometric pressure on the outside of the cylinder is constant at 1.00 atm and the temperature is 300.0 K.
Glass will dissolve in concentrated solutions of either NaOH or KOH. At 25C the two reactions below tae place at the same rate. 4NaOH + SiOH2 -->Na4SiO4 + 2H2O is reaction 1. reaction 2 is 4KOH + SiO2 ---> K4SiO4 + 2H2O
Draw the product obtained when trans-3-octene is treated first with Br2 in CH2Cl2, second with NaNH2 in NH3
If a car has an EPA mileage rating of 30 miles per gallon, What is this rating in km L-1? 1 liter = 1 dm3, 1 gallon = 3.785 liter, 1 mile = 1.609 km.
Assuming complete dissociation of the solute, how many grams of \rm KNO_3 must be added to 275 \rm mL of water to produce a solution that freezes at -14.5 ^\circ {\rm C}? The freezing point for pure water
Discuss how precise and accurate measurement can be achieved in spite of the inherent measurement uncertainty. Take a ruler and measure the height of the textbook three times. Record the three measurements, and discuss the uncertainty in your meas..
To treat a burn on your hand, you decide to place an ice cube on the burned skin. The mass of the ice cube is 12.9 g, and its initial temperature is -13.9 °C. The water resulting from the melted ice reaches the temperature of your skin,
What is the volume of 455 mL of oxygen gas at 67.0°C and 300. mm Hg if the conditions are adjusted to 890. mm Hg and 107°C? Assume the amount of gas is held constant.
the atomic masses of 6Li and 7 Li are 6.0151 amu and 7.0160 amu. Calculate the neutral abundance of each isotope. The average atomic mass of Li is 6.941 amu
the density of plutonium metal is 19.84 g/cm3 , and the density of plutonium (IV) oxide is 11.46 g/cm3. over a period of 7-10 years, a 2.5-kg sample of plutonium metal stored at Los Alamos National Laboratory in New Mexico was converted to plutoni..
The atom then emits two photons: one of wavelength 1282.2 nm to reach an intermediate level and a second to return to the ground state. What was the wavelength of the second photon emitted?
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