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0.150 g of anthracene (C14H10- melting point= 216 degrees C) is added to 3.00 g of naphthalene. At what temperature should the mixture start melting?
Calculate the concentration of ethanol in wine in terms of mass percent and molality. mass percent? answer in % molality? answer in mol/kg
aluminum has the mass of 8.37g. when it is placed in a graduated cylinder containing 20.0mL of water, the water level rose 23.1mL. calculate the density and specific gravitas of the object.
A certain mixture of He and Ne in a 356-cm3 bulb weighs 0.1480 g and is at 20oC and 748 torr. Find the mass and mole fraction of He present.
calculate the work done in joules against a pressure of 1.0 atm at 25oc. if 3 moles of h2 react with 3 moles of cl2 to
Nitrogen and oxygen forms an extensive series of oxides with the general formula NxOy. What is the empirical formula for an oxide that contains 36.85 % by mass nitrogen?
One way the rate law for a reaction can be experimentally determined is to monitor the concentration of each reactant continuously over the span of the reaction. Explain in no more than one paragraph how a rate law is derived from the data obtaine..
A sample of 5.0mol CO2(g) is originally confined in 15dm^3 at 280 K and undergoes adiabatic expansion against a constant pressure of 78.5 kPa until the volume has increased by a factor of 3.0.Calculate q,w,delta T,delta U,and delta H
What is the overall reaction rate order of the reaction in (2)? What is the difference between the (1) and (4)?
Predict whether or not a precipitate will form upon mixing 75.0 mL of a NaOH solution with pOH=2.58 with 125.0 mL of a 0.018 M MgCl2 solution. Identify the precipitate, if any. Express as a chemical formula
Suppose 28.3 g of ClF3(g) and 24.4 g of Li(s) are mixed and allowed to react at atmospheric pressure and 25 C until one of the reactants is used up, producing LiCl(s) and LiF(s). Using the NIST value for the enthalpy of formation of ClF3 (webbook...
Calculate the pH in the cathode compartment if the cell emf = 0.67 V when PNO = 1.00 atm, [Sn4+] = 0.10 M, [NO3-] = 0.010 M, and [Sn2+] = 0.020 M
What is the mass of a piece of concrete that starts at 90.0 C, us immersed in a calorimeter with 350.0 g of water at 26.0 C
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