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An ideal gas mixture contains 35% helium, 20% methane, and 45% nitrogen (by volume) at 2.00 atm absolute and 90 ?C. Calculate: (a) The partial pressure of each component. (b) The mass fraction of methane. (c) The average molecular weight of the gas mixture. (d) The density of the gas mixture in kg/ m3. write the steps please
Metallic magnesium reacts with steam to produce magnesium hydroxide and hydrogen gas. If 17.1 g of Mg are heated with 9 g of H2O, what is the limiting reactant.
If the concentration of fluoride in fluoridated drinking water is 1 x 10 ^-5 M and the calcium ion concentration in blood is 2.5 x 10^ -3 M, why is there no danger of CaF2 precipitating in the blood stream, after drinking the water?
hydrogen gas is generated when calcium reacts with water. the volume of gas collected over water at 30 degree celcius and pressure of 988 mm Hg is 641 ml. what is the mass in grams of the hydrogen gas obtained? the pressure of water vapor at 30 de..
Calculate the change in pH when 6.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq)
A student titrated 20.0 mL of 0.410M HCL with 0.320M NaOH. Find the pH, [H3O+], and [OH-] when 21.50mL of titrant has been added.
Consider the titration of 30.0 mL of 0.035 M NH3 with 0.030 M HCl. Calculate the pH after the following volumes of titrant have been added.
If the earths average temperature is 288K,what fraction of the atmosphere absorbed infrared radiation? what is the temperature of this atmospheric layer? if this fraction increased 5% what would be the earths new average temperature?
The vapor pressure of a solution containing 53.6 g glycerin (C3H8O3) in 133.7 g ethanol (C2H5OH) is 113 torr at 400C. Calculate the vapor pressure of pure ethanol at 400C
Home ice cream makers use ice to cool a concentrated NaCl solution below the normal freezing point of water. What molal concentration of salt is needed to lower the freezing point to -3.97 C?
In the lab using conc. HCL and heat, if the solubities of reactant and product were reversed , how would the isomerization be followed. How would one knows when it is complete
That depicts that two hydrogen atoms bond with one oxygen atom to make the compound we call water. If water comprises most of our body mass explain simply why there is a greater amount of oxygen by mass in our bodies than hydrogen.
A 3.575g sample of a monoprotic acid was dissolved in water. it took 22.67ml of a .1453 M NaOH solution to neutralize the acid. what is the molar mass of the acid
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