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A sample of gas has a volume of 35 liters and a temperature of 27 celsius. With the pressure remaining constant, the volume is raised to 50 liters. What is the new temperature?
A 200 MHz proton NMR instrument is used to obtain a ^13C spectrum. calculate the energy difference that will develop between teh two spin states of the ^13C nuclei.
The additive was a compound containing carbon, hydrogen and lead (Pb). When 51.36 g of this compound was burned in excess oxygen, 55.90 g of CO2 and 28.61 g of H2O were produced. Determine the empirical formula of the compound.
The single proton that forms the nucleus of the hydrogen atom has a radius of approximately 1.0x10^- 13 cm. The hydrogen atom itself has a radius of approximately 52.9 pm.What fraction of the space within the atom is occupied by the nucleus?
Given that the density of aluminum is 2.70g/cm^3, What maximum length of aluminum lil can be made from 1.10 kg of aluminum?
The structure of olivine [M2SiO4(whare M=Mg,Fe)] can be viewed as a ccp arrangment of oxide ions with Si(IV) in tetrahedral goles and the metal ions in octahedral holes
A solution is prepared by mixing 0.0300 mol CH2Cl2 and 0.0500 mol of CH2Br2 at 25°C. Assuming the solution is ideal, calculate the composition of the vapor
What would the atom ratio of 206-Pb to238-U be in a uranium mineral from a rock that is 1.0× 10^9 years old? t1/2(238-U)= 4.5 × 10^9 yr.
From the mean bond enthalpy data given below, estimate the enthalpy change for the complete combustion of one mole of butene at 298 K. (The molar enthalpy of vaporization of water is 45.0 kJ mol-1 at 298K)
what volume of methane, measured at STP, must be burned? (ΔH°combustion for CH4 = -891 kJ/mol)
The most common source of copper (Cu) is the mineral chalcopyrite (CuFeS2). How many kilograms of chalcopyrite must be mined to obtain 395 g of pure Cu?
The half-life of Plutonium-239 is 24,000 years. If 10 gms are present now, how long will it take until only 10% of the original sample remains? Round your answer to the nearest 10,000th.
Calculate the ratio of the hydronium ion in acid rain to that in normal rain.
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