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Calculate the number of moles of magnesium, chlorine, and oxygen atoms in 8.30 moles of magnesium perchlorate Mg(ClO4)2
Referring to the standard enthalpies of formation, why would silver not dissolve in hydrochloric acid?
Calculate the heat of combustion of napathalien on a molar basis. Find the molar heat of comb.: q/1 mol. of napthalien
The cell potential of the following electrochemical cell depends on the gold concentration in the cathode half-cell:
What evidence exist to support the theory that an atom contains a massive nucleus that is very small relative to the size of the whole atom
Decide whether or not each of the following metals dissolves in 1M HCl. For these metals that do dissolve, write a balanced redox reaction showing what happens when the metal dissolves
Calculate delta Grxn(in KJ) for the following reaction at 298K: 2H2(g)+CO(g)=CH3OH(g) given that delta H=-90.7 Kj and delta S=-221.5 J/K for this process.
Some atomic properties depend on the average value of 1/r rather than the average value of r itself. Evaluate the expectation value of 1/r for a hydrogenic helium 1s orbital.
What is the value for k, the reaction constant, at 60 degrees if the Energy of activation = 75.5 kJ/mol?
A 4.00 g sample of an aluminum-copperalloy reacts with excess hydrochloric acid. The 2.81 L of H2(g) produced is collected over water at a barometric pressure of 758.4 mmHg and 19°C. What is the mass percent of aluminum in the alloy
chloromethane gas (CH3Cl) at 20.0 degrees celsius and 0.973 atm pressure. The molar mass of a chloromethane is 50.5 g/mol.
The simplest formula of a substance is found to be CH2O, and its approximate molar mass is found by experiment to be 93 g•mol-1. What is its exact molar mass?
FireFlies flash at a rate that depends on temperature. At 29 C the average rate is 3.3 flashes every 10 seconds;at 23 C the average rate falls to 2.7 flashes every 10 seconds.
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