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Determine the heat given off by the burning the Mg, in kJ/g and in kJ/mol. A 0.1625 g sample of solid magnesium is burned in a constant-volume bomb calorimeter that has a heat capacity of 1769 J/&de
Write down a balanced chemical equation for the reaction. State as a chemical equation, identify all the phases in the answer when iron rusts, solid iron reacts with the gaseous oxygen to for
Determine the mass of a solution that has a density of 0.775g/mL and a volume of 50.0mL? Determine the volume of a solution that has a specific gravity of 1.2 and a mass of 185g?
Suppose a barometer were designed using the water with a density of 1.00 g cm-3 rather than mercury as its fluid. Discuss what would be the height of the column of water balancing 1.00 atm pressure.
Calculate the wavelength in the next line in the series? Determine the ionization energy of the atom when it is in the lower state of the transitions?
Determine the numbers of grams of lead will absorb the same amount of energy as 15.0g Ag when each metal is heated from 20.0oC to 35.0oC? Specific heat: lead=.129J/g-K; silver=.237J/g-Kd
Determine the name for the portion of a synthetic reaction which focuses on the isolating the pure compound from the reaction mixture?
Suppose you are given the solid Na2Co3 , distilled a 500. mL volumetric flask and the water and. Explain how to prepare the needed the solution.?
If it is known that the sulfate content in these samples ranges among 20 and 55 % Explain what minimums sample mass should be taken to ensure that a precipitate mass no smaller than .300 g is formed
Air has an average molar mass of 29.0 g/mol. At 1.00 atm the density of air 30 C is what? Explain which formula to use, how you set the equation up and how you solve it.
At STP it is found that 250 mL of gas has a mass of 1.00g. Explain what density of air at 1.00 atm and 30 C is what? Illustrate what formula to use, how to set it up, determine the number is in rega
If Ka is small enough to ignore the value of x then how do you know? And which x's do you ignore and discuss which one do you use to find the value of x?
For the reaction expressed by the equation 6Li(s) + N2(g) --> 2Li3N(s), calculate the mass of lithium nitride that can be formed from a reaction mixture of 10 g lithium and 10 g nitrogen gas.
Explain the concentration of the solution, the molar absorption coefficient of a solute at 440 nm is 423dm3mol-1cm-1, when the light of threat wavelength passes through a 6.50 mm cell containing a s
Determine the frequency and wave number of the J = 2 ← 1transition in the pure rotational spectrum of12C16O. Does the frequency increase or decrease if centrifugal distortion is considered? The e
The heat absorbed by the water and by the rest of the calorimeter must be calculated separately and then added together. An alternative approach to bomb calorimetric is to establish the heat capacit
Determine the pH after addition of 0.00, 4.00, 37.50, 50.00and 53.00 mL of 0.1000 M HCl to a) 50mL of0.1000 M HCl solution b)50mL of 0.0750 M NaOH
Why is it important to allow the level of the liquid in the column to drop to the level of the silica gel before applying the compound to be separated, once the chromatographic column has been prepa
Illastrate that the overall process is equivalent to an isothermal expansion of the gas at T from V to 3V, where V is the original volume.
At 400deg C the 2.00 mol of NOCl was placed in a 2.00 L reaction vessel. After equilibrium was established, it was found that 24percent of the NOCl had dissociated according to the reaction:
Calculate the amount of heat given off when the 1.26 X104 g of ammonia is formed according to the equation:
Alcoholic fermentation is the process in which carbohydrates are broken down into the carbon dioxide and ethanol. The reaction is very complex and includes a number or enzyme-catalyzed steps.
When it was placed in a graduated cylinder which is having the 20.0mL of water, the water level rose to 23.1mL. An object made of aluminum has a mass of 8.37g. Determine the density and gravity of
A gaseous mixture of O2 and N2 which is having the 40.8 % nitrogen by mass. Calculate the partial pressure of oxygen in the mixture if the total pressure is 525 mmHg?
The forces measured by AFM arise primarily from interactions among the electrons of the stylus and on the surface. To get an idea of the magnitudes of these forces, determine the force acting among