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1. The chemical reaction is given CaCN2 + 3 H2O → CaCO3 + 2 NH3 follow this equation and calculate how much CaCN2 is required to form 12.6 moles of ammonia? Given that the percent yield is 65.8%?
2. When 42.52 g of CH3CH2OH (ethanol) is combined to 125g of H2O (water) then find out what will be the mole fraction of ethanol?
If 20.0 g acetylene is allowed to completely react with oxygen , how many g of O2 are reacted? 2C2H2 + 5O2→ 4CO2 + 2H2O
A 0.150-mole quantity of NiCl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of Ni2 ions at equilibrium. Assume the formation constant* of Ni(NH3)62 is 5.5 × 108.
Use the following data on oxygen solubility to calculate the enthalpy of reaction for oxygen dissolving into water.
How efficient is the extraction of tea leaves containing 1.0 g of caffeine with two 30-mL portions of chloroform over that of a single step extraction (K25ºC = 8.36)?
At 25 °C and 795 Torr, carbon dioxide has a solubility of 0.0356 M in water. What is its solubility at 25 °C and 2030 Torr?
You have a volume of 100 L at a concentration of 100 PPM of benzene. If you later sampled from this known concentration at a temperature of 15° C
Isotopes Decay, Isotopes decay according to first order kinetics with a predictable half life
an acetic acid solution of 2.87 pH is titrated with 1.5 mL of bromocresol green. When the color changes to light green
The temperature of a lead fishing weight rises from 26 degrees Celsius to 38 degrees Celsius as it absorbs 11.3 J of heat. What is the mass of the fishing weight in grams.
Determine the new equilibrium concentration of hydrogen, if the hydrogen concentration is raised by 0.299 M?
The person selling the coin priced it at $200, claiming it was pure gold. Being a well-equipped traveler and a chemist, the professor produced his graduated cylinder and electronic balance. The coin had a mass of 18.82 g and raised the water level..
You have a balloon that is not permeable to gas molecules. The balloon is spherical and has a circumference of 3.141592654 m when it is filled with a gas at 20 EC and 1.0000 atm pressure.
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