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combustion of 1.031g of a compound containing only carbon, hydrogen and oxygen produced 2.265g if carbondioxide and 1.236g of water. What is the empirical formula for the compound?if the molecuar weight is 180.3g, what is the molecular formula?
How many moles of oxygen will be produced if 27.6 grams of Al are produced?
16.57 The complex [Ni(NH3)6]2+ has a ligand field splitting of 209 kJ·mol-1 and forms a purple solution. What is the wavelength and color of the absorbed light.
Calculate the molar mass of X. 2.Identify the element symbol for X F2+2XBr -----> Br2+2XF
A stream of humid air containing 1.00 mole % H2O(v) and the balance dry air is to be humidified to a water content of 10.0 mole % H2O. For this purpose
diamond crystallizes in a cubis cell with a+0.35670 nm and Z=8. Using 3.51 g/cm cubed as the density of diamond calculate te value of avagadro's number.
22.4 liters of a gas weighs 70g at S.T.P. Calculate the weight of the gas if it occupies a volume of 20 liters at 27C and 700mm Hg of pressure
3.24 x 10-3 g of a protein was dissolved in water (total vol. of 5.00 mL). Given the osmotic pressure of the solution was 1.50 x 10-3 atm and the temperature is 298.0K, calculate the molar mass of the protein.
A solution is made by adding 50.0 mL of ethanol (C2H5OH, d = 0.789 g/mL) to 50.0 mL of water (d = 0.998g/mL). What is the total vapor pressure over the solution
What is the density in g/L of a gas mixture that contains 27% F2 and 73% He by volume at 714 mm Hg and 27.5 C.
A creature moves at a speed of 3.20 furlongs per fortnight (not a very common unit of speed). Given that 1 furlong = 220 yards and 1 fortnight = 14 days
An unknown gas effuses at a rate of 86.6 mol/hr. Under similar conditions, I2 effuses at a rate of 30.4 mol/hr. What is the molar mass of the compound.
Calculate the pH at the points in the titration of 20.00 mL of 0.318 M NH3 of 0.470 M HCl have been added. For NH3, K_b=1.8*10^-5.
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