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A cube of Al is needed that has a mass of 89.1 g. What must be the length of the cube's edge in cm?
What is the total number of atoms in the molecules formed in 4Pcl3?
a critical reaction in the production of energy to do work or drive chemical in biological systems is the hydrolysis of adenosine triphosphate, ATP to adenosine diphosphate ADP
The concentration of a biomolecule inside a rod-shaped prokaryotic cell is 0.0031 M. Calculate the number of molecules inside the cell, which is 3.5 µm long and 1.4 µm in diameter.
Complete combustion of 3.90 g of a hydrocarbon produced 12.0 g of CO2 and 5.54 g of H2O. What is the empirical formula for the hydrocarbon?
what mass of aspirin can be prepared by reacting 5.00 g if salicylic acid with an excess of acetic
What is the silver ion concentration in a solution prepared by mixing 353 ml of .357 M silver nitrate with 425 ml of .494 M sodium carbonate?
Assuming the solution has a heat capacity of 4.18 J/°C · g and assuming no heat loss to the calorimeter, calculate the enthalpy change for the dissolution of NH4NO3 in units of kJ/mol.
A 0.2254g sample of naphthalene (C8H10, 128.16g/mol) was burned in a bomb calorimeter with a heat capacity of 2.18kJ/K and temperature increased by 4.16 Celcius, what is the molar enthalpy of combustion for this compound
A metal, M, was converted to the chloride, MCl2. Then a solution of the chloride was treated with silver nitrate to give silver chloride crystals, which were filtered from the solution
Explain why one would recrystallize a solid from a solvent pair. Explain how it works in terms of solubilities. What were you observing when your ethanol - water solutions became cloudy
derive an expression for the compression factor of a gas that obeys the equation of state pv-nbnrt where b and r are
The difference between the transition state and the energy of the products. C. The difference between the energy of the products and the energy of the reactants. D. Undefined because it depends on whether the reaction is endothermic or exothermic.
A pressure of 0.49 atm of NO2 is introduced into a container and allowed to come to equilibrium. Explain what are the equilibrium partial pressures of NO(g) and O2(g)
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