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What is the atomic mass of lead on the planet Xygr if the composition is 13.60 % Pb-206, 17.84 % Pb-207, 19.45% Pb 208 and the rest Pb-204? The masses are 205.974 ; 206.976 ; 207.977 and 203.973 amu, respectively. Enter the answer to three decimal places.
the thermite reaction is a very exothermic reaction it has been used to produce liquid iron for welding. a mixture of 2
Two flasks are connected with a stopclock. The first flask has a volume of 5 liters and contains nitrogen gas at a pressure of 0.75 atm. The second flask has a volume of 8 L and contains oxygen gas at a pressure of 1.25 atm.
A sample of nitrogen gas in a 4.6-L container at a temperature of 30.°C exerts a pressure of 3.9 atm. Calculate the number of moles of gas in the sample.
show states of matter and charges where appropriate. Also find molecular equation, total Ionic Equation, and Net Ionic Equation.
The combustion of 45.0 g of methane (natural gas) releases 2498 kJ of heat energy. How much energy in kilocalories kcal would combustion of 0.670oz of methane release.
4HCl(aq) + O2(g)--->2H2O(l) + 2Cl2(g) how many molecules of Cl2 would be formed from the reaction mixture that produces the greatest amount of particles?
A pressure gauge indicates the pressure inside a reaction vessel is 326.7 psig. If the barometric pressure is 755 mm Hg what is the vessel's absolute pressure expressed in kPa.
Definition for electrophilic, transition state and Markovnik , electrophilic, transition state
Assuming these values change very little with temperature, over what temperature range is the reaction spontaneous in the forward direction
The heat capacity of bomb calorimeters are determined by running a known, standard reaction. The combustion of 2.450 mmol of x caused the temperature of a bomb calorimeter to rise from 23.400
What is the enthalpy change when 100g of water at 50degrees celsius turns into ice at -30 degrees celsius. Specific heat: Ice= 2.09 J/g * K, Water= 4.18 J/g * K, Steam= 1.84 J/g * K Water ?Hfusion= 6.01 KJ/mol and Hvaporization= 40.67 KJ/mol
Al^3+ is reduced to Al(s) at an electrode. If a current of 2.75 amperes is passed for 36 hours, what mass of Al is deposited at the electrode. Assume 100% current efficiency.
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