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On combustion 2.4 gram of a compound of carbon, hydrogen and oxygen gave 3.52 gram of CO2 and 1.44g of H2O. The molecular mass of the compound was found to be 60 amu.
a. What are the masses of carbon, hydrogen and oxygen in 2.4 g of compound?
b. What are the molecular and empirical formulae of the compound?
the ratio of the no of molecules in the excited state at the temperature of 213 K to the number of ground state molecules and the percent of the excited molecules at 213 K.?
ch3br aq oh- aq -gt ch3oh aq br- aq . the reaction is first order in each reactant. a write the rate law. b how does
A metal crystallizes in a face-centered cubic lattice. The radius of the atom is 128 pm and the density of the element is 8.92 g/cm3. What is the identity of the metal?
A solution of sodium chloride in water has a vapor pressure of 20.3 torr at 25°C. What is the mole fraction of NaCl in this solution?
1 a 25.0 ml sample of 0.300 mnh3aq is titratedwith 0.300 m hclaq. what is the ph at the equivalence point?kb of nh3 1.8
Calculate the work done in Joules when one mole of an ideal gas, initially at P = 9 atm, T = 298 K is expanded isothermally to P = 1 atm if (a) the expansion proceeds against a onstant external pressure Pext = 1 atm; (b) the external pressure is r..
What would you guess is the sign for the change in entropy for this reaction. b) What is the expected sign for the change in free energy for this reaction c) Finally, what is the expected sign for the change in enthalpy for this reaction
Assume you are performing the calibration step of Experiment 8 and you begin with 70 g of water at 20 oC and 70 g of water at 80 oC. After adding the two portions of water into your calorimeter setup and following the procedure outlined in the exp..
Calculate the mean percent of hydrogen peroxide when three determinations were 3.03% , 2.89% and 3.22%
how many moles of sodium hypobromite rm nabro should be added to 1.00 rm l of 5.0times10-2 m hypobromous acid rm hbro
A lithium atom is contained in a cubic well 10 nm on a side. (a) Calculate the energy (joules) required to achieve the transitions from the ground state to the first excited state for this system
Write the first step in this elimanation reaction, using curved arrows to show electron reorganization. OH- CH3-C-(CH3)2Cl
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