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The standard enthalpy change for the reaction below is 436.4 kJ/mol. Calculate the standard enthalpy of formation of atomic hydrogen (H). H2(g)-->H(g) + H(g)
If a 220 mg piece of gold (density =19.32 {rm g}/{rm cm}^{3}) is hammered into a sheet measuring 2.5times1.0 {rm ft}, what is the average thickness of the sheet in meters?
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
A 20.0 mL sample of 0.150 M KOH is titrated with 0.125 M HClO4 solution. Calculate the pH after the following volumes of acid have been added.
caculate the amount of heat liberated ( in kj) from 335g of mercury when it cools from 59.0 to 12.0 c
One of the nobles gase of group was isolated in 1894 by allowing a large volume of air to react with magnesium so that the only noble gas, contaiminated with tracs of other noble gases,
a 50.0 g sample of water is cooled from 30 degrees Celsius to 15 degrees Celsius losing 3140 J of heat What is the change in enthalpy.
Explain if you have an equimolar mixture. If not, discuss how you would achieve equimolar condition. Show calculations if necessary.
Design a synthesis of 4-(carboxymethyl)-nitrobenzoic acid starting with benzene and any other necessary reagents
Arrange the members of the following set of elements in order of increasing first ionization energies. (Use the drop down lists to indicate your choice, with 1 as the smallest IE and 6 as the largest IE.)
If aluminum and sulfide come together to form an ionic compound, the formula for the ionic compound would be
Draw the stereochemical (3-D) structures of these compounds and explain these observations.
A gaseous mixture of O_2 and N_2 contains 40.8% nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 325 mmHg?
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