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MgNH4PO4.6H2O loses H2O stepwise as it is heated. Between 40c and 60 the monohydrate is formed, and above 100 celcius the anhydrous material is formed.What are the phosphorus percentage of the monohydrate and of the anhydrate material?
Ethanol (C2H5OH) melts at -114 °C. The enthalpy of fusion is 5.02 kJ/mol. The specific heats of solid and liquid ethanol are 0.97 J/g-K and 2.3 J/g-K, respectively.
Calculate the mass (in mg) of KCN needed to make 500. mL of aqueous KCN solution with a pH of 10.00.
When 79.272 cg of nitrogen gas is reacted with 79.272 cg of hydrogen gas, how many grams of ammonia are formed?
You use 32.0 mL of NaOH to titrate 100. mL of HCl and 22.2 mL of NaOH to titrate 50.0 mL of 0.0836 M H2SO4. Find the unknown concentrations. NaOH HCl
Assume that the kinetic energy of a 1250 kg car moving at 115 km/h could be converted entirely into heat. What amount of water could be heated from 19 C to 48 C by the car's energy.
An iron bar of mass 869 - g cools from 90 oC to 5 oC Calculate the heat released (in kilojoules) by the metal. ( specific heat = 0.44 J/(g. c)
A.117 gram sample of a metal reacts with hyrdochloric acid to produce 36.3 ml of dry hydrogen gas, measured at STP. what is the equivalent weight of this metal?
Explain different moderators used in nuclear reactors
If 20.0 g acetylene is allowed to completely react with oxygen , how many g of O2 are reacted? 2C2H2 + 5O2→ 4CO2 + 2H2O
What mass of this substance must evaporate to freeze 185g of water initially at 17 degrees Celsius? (The heat of fusion of water is 334J/g; the specific heat of water is 4.18 J/g-K.)
How many liters of H2 at 23.0C and 733mm Hg are released when 1.98g of Na reacts with unlimited water?
The half-life of Plutonium-239 is 24,000 years. If 10 gms are present now, how long will it take until only 10% of the original sample remains? Round your answer to the nearest 10,000th.
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