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If 12.09 of magnesium oxide decomposes to form 7.29 of magnesium, what mass of oxygen gas is also released in the reaction?
sodium hydroxide solution for neurtalization to a phenolphthalein end point, calculate the molarity of the phosphoric acid.
An excess sample of solid Ag2SO3 is added to 100 mL of water. After equilibrium is achieved between the solid and its aqueous ions the silver ion concentration is found
The binding energy of electrons to gold is 492 kJ/mol. What is the longest wavelength of light shone on gold that will cause electrons to be ejected?
A mixture of Ne and Ar gases at 347 K contains twice as many moles of Ne as of Ar and has a total mass of 52.0 g. If the density of the mixture is 3.86 g/L, what is the partial pressure (in atm) of Ne?
The solution of iron (III) chloride used in this experiment is 0.02M. Determine the amount of iron (III) chloride hexahrdrate
Asumming equal concentrations of conjugate base and acid, which one of the following mixtures is suitable for making a buffer solution with an optimum ph
What is a catchy, orignal slogan for the element neon that describes one of its important uses?
For the reaction 2 HCl + Na2CO3 → 2 NaCl + H2O + CO2 what volume of 0.45 M HCl solution would be needed to produce 2.5 L of CO2 at STP
The gas remaining in the bottle slowly warms up to 285 K. What is the final pressure in the bottle for a monatomic gas, for which CV = 3R/2, and for a diatomic gas, for which CV = 5R/2?
A sample of gas occupies 250 mL at STP. What is the temperature if the gas expands to 1500 mL at a pressure of 0.500 atm?
Calculate the delta H and delta S if the temperature of 1.75 moles of Hg(l) is increased from 0.00C to 75.0C at 1 bar. Over this temperatur range, Cp,m(J K^-1 mol^-1)=30.093-4.944 x 10^-3T/K.
What do you notice about the element Technetium (Tc) compared to the other elements around it? You see the same thing as some of the very heavy elements
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