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A steel cylinder with nitrogen, hydrogen, and ammonia gases is at 500°C and 4.91 atm. If the partial pressure of nitrogen is 1850 mmHg and hydrogen is 1150 mmHg, what is the partial pressure of ammonia in mmHg?
A mixture of sand and iron pieces weighs 53.29 g. Using a magnet, the iron is removed and weighs 15.63 g. What is the percent composition of sand in the mixture?
If a 190 mg piece of gold (density =19.32 g/cm^3) is hammered into a sheet measuring 2.1*1.0 ft, what is the average thickness of the sheet in meters?
A patient needs 2.80×10-2 of a sulfa drug. There are 8.00 tablets in stock. How many tablets should be given?
To make a phosphate buffer at pH 9.6 starting with 1L of 10 mM phosphoric acid (H3PO4; pKs are of 2.15, 6.82, and 12.38 determine how much KOH ), you could add?
Mg3N2 + 6H2O ----> 3Mg(OH)2 + 2NH3 When 36.0g of H2O react, how many grams of NH3 are produced?
Determine the pH of 263 ml of solution which has [NH4I] = 0.300 M. Kb = 1.74 × 10-5 for NH3(aq)
A buffer is made using 45.0 mL of 0.750 M HC3H5O2 and 55.0 mL of 0.700 M NaC3H5O2.What volume of 0.10 M NaOH must be added to change the pH of the original buffer solution by 2.5%? Ka for this acid is 1.3 x 10
In the bromination of ethane (C2H6) reaction, one wants to produce 10.0 g of C2H5Br product. How many grams of C2H6 would be needed to react with excess Br2.
Balanced thermochemical equation and enthalpy diagram, The decomposition of zinc carbonate, ZnCO3(s), into zinc oxide, ZnO(s), and CO2(g) at a constant pressure requires the addition of 71.5kJ of heat per mole of ZnCO3.
Nitrogen and oxygen gases react to form dinitrogen trioxide gas. 2 N2(g) + 3 O2(g) -> 2 N2O3(g) At a certain temperature and pressure 4.2 L of N2 reacts with 6.3 L of O2.
calculate the ph of the solution that is 0.20M hydrofluoric acid and 0.040 M Lithium fluoride. the Ka for hydrofluoric acid is 3.5*10^-4.
In the purification process, the organic layer is washed sequentially with 2 M NaOH, water, and saturated aqueous sodium chloride. What is the purpose of each of these washes and why is cold 2 M NaOH recommended?
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