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an intimate mixture of Fe2O3 and Al is used in solid fuel rocket .calculate the fuel per g and per ml of mixture. del Hal2o3 =399 kcal , del H fe2o3 =199 kcal density of Fe2O3 and AL are 5.2 g /ml and 2.7 g /ml respectively
Which term or terms could be used to describe this sample of gold? Check all that apply. mixture heterogeneous mixture homogenous mixture solution pure chemical substance compound element
Determine the concentration of CO32- ions in a 0.18 M H2CO3 solution. Carbonic acid is a diprotic acid whose Ka1 = 4.3 x 10-7 and Ka2 = 5.6 x 10-11."
A system absorbs 159 kJ of heat, and performs 83 kJ of work on the surroundings. What is the change in E of the system
A compound contains only carbon, hydrogen, nitrogen and oxygen. Combustion of 0.314 g of the compound produced 0.426 g CO2, and 0.0620 g H2O. In another experiment it is found that 0.103 g of the compound produces 0.0460 g of NH3
2ZnS + 3O2 = 2ZnO + 2SO2 how many moles of Zno are produces when 32 gms of oxygen is allowed to react with an excess of ZnS?
What is the molarity of a solution made by dissolving .34 moles of NaCl in 455 mL of water?
Calculate the energy in joules required to ionize a hydrogen atom when its electron is initially in the n=2 energy level
you have 100 mL graduated cylinder containing 50 mL of water. you drop a 154 g piece of brass (d= 8.56 g/cm3) into the water. how high does the water rise in the graduated cylinder?
How many milliliters of 0.0120 M Na2S2O3 solution are needed to dissolve 0.740 g of AgBr.
A swimming pool contains 88,000 liters of water and it having a surface area of 5 meters by 10 meters. It is observed that when this swimming pool is heated by the Sun for six hours.
The formation of a white solid id often observed after alpha-phenylethylamine comes into contact with carbon dioxide in the atmosphere. What is that white compound? Give an equation that shows its formation.
Butane C4H10 is a component of natural gas that is used as fuel for cigarette lighters The balanced equation of the complete combustion of butane is
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