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Calculate the composition, in weight percent, of an alloy that contains 90 kg of Fe, 20 kg of Cr, and 15 kg of Ni. What is the composition of this alloy in atomic percent? Please show your work.
Both on Earth and in the sun the abundance of N is lower that that of its neighbors C and O. Is this the expected observation. explain
If the molar enthalpy of combustion of ethane is -1.56 MJ/mol, how much heat is produced in the burning of;
a 125 g metal block at a temperature of 93.2 degrees celsius was immersed in 100 g of water at 18.3 degrees celsius.
A 99.11 g sample of a highly radioactive element is determined to contain 0.4271 mol of the element. What is the element
Explain the naming laws to name elements. and also how to derive the chemical formula from the names given.
what mass of the hydrate could be recovered from the solution? when separated from a h2o solution copper sulphate forms
A sample of an ionic compound that is often used as a dough conditioner is analyzed and found to contain 7.591 g of potassium, 15.514 g of bromine, and 9.319 g of oxygen. What is the empirical formula for this compound? What is its chemical name?
When white phosphorous (P4) is heated above 1100 K, the following equilibrium is observed in the gas phase P4 ? 2P2 b. The equilibrium constant has been measured as a function of temperature for this reaction
The mass spectrum of an organic compound shows the relative abundance of M to be 34.29% and M+1 to be 8.901%. Assuming the peaks are caused by 12C and 13C isotopes, determine the number of carbon atoms in the compound. Natural abundance: 12C is 98..
determine the final volume of the gas If the gas ocupied 68mL, initally and determine the molarity of the solution
A metallic solid with atoms in a face-centered cubic unit cell with an edge length of 385 pm has a density of 6.84 g/cm3. Calculate the atomic radius of the metal.
What is the hybridization of phosphorus in the phosphonium ion (PH4+)? If someone can tell me how to figure this out I would really appreciate it. Any shortcuts or hints on how to solve it?
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