How many grams of reactant remain after limiting reactant
4NH3 + 5O2 yields 4NO + 6H2O
Given 1.50g of NH3 reacts with 2.75g of O2 which is the limiting reactant? How many grams of the excess reactant remain after the limiting reactant is completely consumed?
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A sample of pure NO2 is heated to 336 degree Celsius at which temperature it partially dissociates according to the reversible equation.
Calculate the molar mass of a nonelectrolyte that lowers the freezing point of 25.00 g of water to -3.9 degrees Celsius when 4.27 g of the substance is dissolved in the water.
Calculate the wavelength of the electromagnetic radiation required to excite an electron from the ground state to the level with n = 5 in a one-dimensional box 39.8 pm in length.
Radioactive wastes are stored in a spherical type 316 stainless steel tank (kss = 13 W/mK) of inner diameter 1 m and 1 cm wall thickness. Heat is generated in the wastes at a rate of 3 × 104 W/m3.
It takes 217 kJ/mol to eject electrons from a certain metal surface. What is the longest wavelength of light (nm) that can be used to eject electrons from the surface of this metal via the photoelectric effect?
In an experiment similar to the empirical formula experiment in the lab book, a student reacted beryllium and oxygen from the air. The initial mass of beryllium was 0.915 g. The final product had a mass of 2.54g. What is the expression that gives
Given the equation A(aq) + 2B(aq) 3C(aq) + 2D(aq). 45.0 mL of 0.050 M A is mixed with 25.0 mL 0.100 M B. At equilibrium the concentration of C is 0.0410 M. Calculate K.
At 80 deg C the vapor pressures of pure liquids X, Y, Z are 385, 190, 66 mm Hg, respectively. What pressure must be exerted on the surface of a solution containing one mole of X, three moles of Y, and two moles of Z for boiling to begin at 80 deg
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