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What mass of melamine, C3N3(NH2)3, will be obtained from 101.5 kg of urea,CO(NH2)2, if the yield of the overall reaction is 72.0%?
Express your answer to three significant figures and include the appropriate units.
Assuming this particle is a single crystal, how many unit cells are lined up across the diameter of the particle? d. Calculate the mass of the particle. e. Approximately how many atoms does this particle contain?
Write about a hazardous materials incident or an environmental health and safety (EHS) project that involves a material(s) with a hazard(s) that falls under the hazard classification that we have studied so far (water/air reactive, corrosive, or toxi..
Find the standard free energy change in G at 25 C for the following reaction using standard free energies of formation. What is the value of K at 25 C for this process?
Problem- the typical energy differences for transitions in the microwave, IR, and electronic spectroscopies are 5x10^-22 J , 0.5x10^-19 and 1x10^-18 J. 1) Calculate the ratio of the number of molecules in two adjacent energy levels at 300 K in each..
Elemental analysis of putrescine (The rotten smell of a decaying animal carcass is partially due to a nitrogen-contained compounded) showed
A solution contains 100.0 g of water,10.0 g NaCl,and 15.0 g methanol. what is the weight(mass) percent of methanol in the solution
How many total atoms are there in each unit cell? (b) What is the volume of one unit cell in Å3? (c) Assuming that the atoms are spheres and the radius of each sphere is 1.64 Å
A 2.5 L helium balloon is filled at a florist's shop. If the temperature inside the shop is 68°F, what volume will the helium occupy after being left in an automobile at ?5°F in the parking lot for the day
Explain why the 2.7 μm superficially porous particle enables separations similar to those achieved by 1.8 μm totally porous particles, but the superficially porous particle requires lower pressure.
Maintenance of pH is vital to the cells of all living organisms because enzyme activity is influenced by pH. What is the intracellular pH range of most cells?
what is the theoretical yield of carbon dioxide when 56.0 g of methane is burned in a excess of oxygen, according to the equation CH4 2 )2 ->CO2 ,2H2o.
A 25.0-mL sample of 0.125 M pyridine is titrated with 0.100 M HCl. Calculate the pH at 0, 10, 20 of added acid.
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