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The mass spectrum of an organic compound shows the relative abundances of M to be 62.87% and M 1 to be 4.760%. Assuming the peaks are caused by 12C and 13C isotopes, determine the number of carbon atoms in the compound. Natural abundances: 12C is 98.93% and 13C is 1.07%
acetylene (C2H2) torches are used in welding. How much heat in kJ evolves when 5.0g of C2H2 (d=1.0967kg/m^3) is mixed with a stoichiometric amount of oxygen gas?
25 g of a certain metal is heated in boiling water and then poured into 90 mL of water initially at 22.0oC. After the water has resumed a constant temperature.
If 141 mL of wet H2 is collected over water at 24°C and a ba?rometric pressure of 738 torr, how many grams of Zn have been consumed.
Calculate what will be the amount of heat, q, absorbed by the calorimeter apparatus also express your answer in kJ? (heat capacity = 2.677 x 103 J/K)
How many grams of chlorine gas are needed to react with 11.5 grams of sodium metal
what are the heats of formation of the following species.
Calculate the molar concentration of Tl+ and Cl- in this saturated solution. Calculate Ksp value for TlCl at this temperature
If the aluminum block is initially at 25^C, what is the final temperature of the block after the evaporation of the alcohol? Assume that the heat required for the vaporization of the alcohol comes only from the aluminum block and that the alcohol ..
A cylindrical glass tube 15.0 cm in liength is filled with ethanol. The mass of ethanol needed to fill the tube is found to be 9.64g.
Ammonia reacts with nitrogen monoxide to produce nitrogen gas and water vapor. If .240 moles of ammonia react, how many moles of nitrogen monoxide will be consumed?
A flask containing 450 mL of 0.47 M H2SO4 was accidentally knocked to the floor. How many grams of NaHCO3 do you need to put on the spill to neutralize the acid according to the following equation?
The reaction A=B+ C is second order in A. when [A}0=0.100M, the reaction is 20% complete in 35 minutes. Calculate the value of the rate constant in ( L/min.mol)
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