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Treat 250.0 g of Ca3(PO4)2 with 150.0 g of H2SO4. How many grams of superphosphate could be formed?
find the methylmercury CH3Hg concentration in fish at which regular consuption at 50g/day becomes unacceptable health risk. use epa reference dose for methylmercury
When acetylene (ethyne) is passed through a solution of copper(I) chloride a red precipitate of copper acetylide, CuC2
Volume after mixing is 131mL. Kf=1.86 C/m -- Kb=0.512 C/m Calculate the freezing point and boiling point?
10.0 mL of a 0.30 M sodium phosphate solution reacts with 20.0 mL of a 0.20 M lead(II) nitrate solution (assume no volume change)What mass of Pb3(PO4)2 will form
Helium is compressed isothermally and reversibly at 100 celcius from a pressure of 2 to 10 bar
Determine the work done by the evolution of H 2 in the subsequent reaction on the surrounding atmosphere with1atm pressure and at 25 degree celsius temperature and express your answer in Joule
If 2.45 g of X reacts with 6.55 g of M to produce 11.25 g of a compound with the formula M2X3, and the atomic mass of M is 42.0 amu, what is the atomic mass of X
Calcium fluoride, CaF2, is a source of fluorine and is used to fluoridate drinking water. Calculate its molar mass to four significant figures.
Sketch a qualitative MO diagram for [Ni(NH3)6]2+ and identify the portion of the diagram considered by crystal-field theory. Imagine the ammonia ligands were all exchanged with a pi-donor ligand
ideal gas in 2.0 L what will be the volume of the gas if the pressure on the container is doubled while the temperature is reduced from 400 K to 200 K.
how to calculate mole fractions of two sustances given their weight percentages ,grams
Calculate the percent yield for the reaction: P4 (s) + 6 Cl2 (g) → 4 PCl3 (l) if 75.0 g of phosphorus reacts with excess chlorine gas to produce 111.0 g of phosphorus trichloride.
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