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Argon gas is 10 times denser than helium gas at the same temperature and pressure. Which gas is predicted to effuse faster? How much faster?
a student heated a .546 gram pure chemical in an atmosphere of oxygen gas until it had completely reacted the final chrominum compound weighed .798 grams what is the empirical formula of this compound?
The extrapolated literature value of KEQ for the formation of FeNCS^2+ at 25 degrees C and zero ionic strength is 1047. Predict the equilibrium concentration
A sophisticated ultraviolet/visible/near-IR instrument has a wavelength range of 185 to 3000nm. What are its wavenumber and frequency ranges
calculate the limiting reactant and excess reactant for the synthesis of methyl Orange. I'm not sure what reagents to use for my calculations
At 1045K the partial pressures of an equilibrium mixture of H2O (g), H2 (g), and O2 (g) are .040, .0045, and .0030 respectively. Calculate the value of the equilibrium constant Kp at 1045K
What techniques might you employ to induce crystallization if no crystals have formed after you cool the solution to room temperature.
The solubility of lead (II) sulfate is 4.0x10^-2 g/L. What is the solubility product constant for lead (II) sulfate?
A piece of lead is placed into a graduated cylinder. The level of the liquid rises from 235 to 305 mL. What is the mass in grams of the lead if the density of lead is 11.3g/cm3?
A 4.40 g nugget of pure gold absorbed 295 J of heat. The initial temperature was 21.0°C. What was the final temperature?
Enter formulas for these ionic compounds. copper(I) bromide copper(II) bromide iron(III) bromide lead(IV) bromide copper(I) oxide copper(II) oxide iron(III) oxide lead(IV) oxide
An oxygen molecule having the average velocity at 300K is released from the earth's surface to travel upward. If it could move without colliding with other moleucules, how high would it go before coming to rest. How high could it go if it had the ..
What is the entropy change for freezing 4.25 g of C2H5OH at 158.7 K? H = -4600 J/mol. Answer in units of J/K.
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