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Barium azide is 62.04% Ba and 37.96% N by mass. Assuming that barium exists as its most stable cation in the above compound, what is the molecular formula of barium azide, how many nitrogen atoms co
What is the pH of this buffer? pH = (b) What is the pH of the buffer after the addition of 0.56 mol of NaOH? (assume no volume change) pH = (c) What is the pH of the original buffer after the additi
Calculate the standard enthalpy of formation of gaseous carbon dioxide (CO2) using the following thermochemical information: 2 C(s) + H2(g) C2H2(g) H = +226.8 kJ 2 C2H2(g) + 5 O2(g) 4 CO2(g) + 2 H2O
At 5 oC the equilibrium constant for the reaction: 2 HBr(g) H2(g) + Br2(g) is KP = 2.80e-16. If the initial pressure of HBr is 0.00991 atm, what are the equilibrium partial pressures of HBr, H2, and
Calculate the concentration of the acid solution after all the metal has reacted.
Compute the concentration in molarity of an NaOH solution if 25 ml of solution is needed to neutralized 19.1 ml of 0.305 M HCl solution
A cube of brass, 2 cm on a side, is heated until the temperature of the brass is 75oC. The cube is quickly added to 100 mL of water at 23oC. What is the final temperature of the mixture? The specifi
If 30 ml of 0.150M cacl is added to 40ml of 0.1 M AgNo3. What is the mass of AgCl preciptate
What percentage of the Ca2 (aq) can be separated from the Ag (aq) by selective precipitation? hint: Ksp for Ag2SO4 is 1.20×10^-5 Ksp for CaSO4 is 4.93×10-5
A sample of 0.836 gm of unknown compound containing barium ions Ba2+ is dissolved in water and treated with an excess of Na2So4. If the mass of BaSo4 precipitat formed 0.7403 gm, what is the percent
The concentration of NaCl in solution is 0.25 M. What volume of solution contains 5.0 g NaCl. A. 1.4 L B. 73 mL C. 340 mL D. 2.9 L
The minimum volume % of vapor that gives a combustible mix is called the lower flammable limit (LFL). Generally, the LFL is about half the stoichiometric mixture, the concentration required for comp
How many grams of NaCl are needed to make a 5.0% w/v saline solution having a total volume of 300.0 mL
How many grams of MgCl2 are needed to make a 3.35% w/v solution having a total volume of 500.0 mL
How does an increase in pressure effect the solubility of a gas in a liquid. A. As pressure increases, gas solubility increases. B. As pressure increases, gas solubility remains the same.
An aqueous solution contains metal cations Hg^+2 and Mn^+2 belonging to groups 2 and 3 respectively. Thioacetamide which produces H2S is added and the solution is buffered to a pH of 8 by addition o
If 25 g of methanol (CH4O) are dissolved in 147mL of solution, what is the molarity of the solution
Solubility of a gas in a liquid increases as the temperature increases. D. The solubility of a gas in a liquid increases as the pressure increases.
You are about to perform a reaction that requires 1.25 mol of CaCl2 to go to completion. The solution available in the stock room has a concentration of 33 % w/v. How many mL of this solution will y
The concentration of NaCl in solution is 0.25 M. What volume of solution contains 5.0 g NaCl.
In the stock room you find a 12.0 M solution of HCl. How many mL of this solution should you dispense to make your diluted solution
Calculate the final temperature after the two substances are mixed together. The specific heat of water is 4.184 J/ g *c and the specific heat for silicon is 0.7121 J/ g*c.
The molecule ethanol (CH3CH2-OH) is very soluble in water. What intermolecular attraction is responsible for its solubility
A beaker of salt water has some solid NaCl at the bottom. What type of solution is in the beaker
Hydrocarbons containing halogens are very useful molecules in synthetic chemistry. Use tabulated thermodynamic data as needed to calculate