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Find the weight of Caco3 in a sample if, it had been treated with 50 ml of 0.2 M HCI. titration the residual HCI took 10 ml of a NaOH solution. It is given that 24 ml of this NaOH solution is required for a titration of 25 ml of the HCI?
Calculate the ion mobility of 100nt long DNA molecules and single nucleotide molecules. Correlate this to the conductivity of the solution.
Titanium (III) chloride, a substance used in catalysts for preparing polyethylene, is made by high-temperature reaction of vapor with 2TiCl4+H2=2TiCl3+2HCl: How many grams of are needed for complete reaction with 150 of at 450 and 785 pressure
As per the Haber Process(N2(g)+ 3 H2(g)= 2 NH3(g) ) ,what mass of nitrogen should you see in the reaction If you must produce 700g of ammonia? Percent yield of this reaction = 70%
A chemist burns a a saltine cracker in a calorimeter containing 2.0 kg of water. The water temperature increases from 25.0°C to 29.7°C. Calculate the heat content of the cracker in J per cracker.
A student dissolves 7.39 g of and unknown protein in 0.286 l of water at 300k. She measures the osmotic pressure to be 3.932 x 10^-3 ATM.
Calculate the enthalpy change of the reaction for per mole potassium carbonate. Assume the specific heat of all solutions are 4.18 J/g°C and all solutions have a density=1.0 g/ml (A:-13.3 KJ) show all calculations please
draw four different lewis electron-dot formulas for the seo2nbspmolecule. hint one should have two single bonds two
Calculate the theoretical yields of the compounds to be prepared in this experiment. The metal ion in both cases is the limiting reagent.
Determine the number of atoms for each element in the reactants.
The rest mass of a proton is 1.0072764669 u and that of a neutron is 1.0086649156 u. The 75As nucleus weighs 74.92160 u. Calculate the total binding energy of the nucleus.
a termolecular reaction is carried out involving only two reactants, A and B, where two molecules of A are involved for each molecule of B. When the concentration of A is 0.415 M
It requires 251 J to melt 2.22 g of sodium metal at its normal melting point of 98°C. Calculate the molar heat of fusion of sodium.
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