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A chemist burns 160g of aluminum oxygen to produce aluminum oxide. She produces 260g of aluminum oxide. Write a balanced equation and calculate the theoretical and percent yield
N2 + 3H2 --> 2NH3 what volume of hydrogen is necessary to react with five liters of nitrogen to produce ammonia?
Determine the equilibrium concentrations - what are the new equilibrium concentrations of all species.
Calculate the standard enthalpy of the reaction, Delta(H) rxn}, for the thermite reaction: 2Al(s) + Fe2O3(s) ----> 2Fe(s) + Al2O3(s) Elements in their standard state have an enthalpy of formation value of zero
a gas sample occupies 4.20 l under a pressure of 800 torr at 350K.At what temperature will it occupy 3.60 L at the same pressure?
does the HCl ionize the NH3 base? is the a conjugate acid or base, HCl is a strong acid, what happens when a strong acid and weak base are mixed?
When 5.6 grams of NaCl are dissolved in enough water to create a 125-gram solution, what is the solution's concentration, expressed as a percent by mass?
Element symbols and Chemical formulas - What is the total number of atoms found in each of the following compounds? What is the total number of elements found in each?
How many moles of CO(NH2)2 are present in 105 g of water, if the freezing point of the solution is -4.02C? kf(water) = 1.86 K · kg/mol.
calculate the molar solubility of silver iodide in 3.0 M NH3. overall formation constant for Ag(NH3)2" is 1.7 x 10^7
A chemist studying the properties of photo- graphic emulsions needed to prepare 500 mL of 0.18 M AgNO3 (aq). What mass of silver nitrate must be placed into a 500 mL volumetric ?ask, dissolved, and diluted to the mark with water? Answer in units o..
The empirical formula for acetic acid is CH2O. Its molar mass is 60 g/mol. what the molecular formula is?
Silver chloride often used in silver plating contains 75.27% Ag. Calculate the mass of silver chloride in grams required to make 4.0 g of silver plating.
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