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How many atoms of hydrogen are there in 3.50 x 102 grams of water?
Calculate the volume change upon mixing sufficient ethanol with 8.85mol of water to give this concentration. The densities of water
Gold is a face-centered cubic structure that has a unit cell edge length of 4.08Angstroms . There are four gold atoms per unit cell. How many gold atoms are there in a sphere that is 20nm in diameter
An electron in an excited state of a hydrogen atom emits two photons in succession, the first at 1817 nm and the second at 97.20 nm, to return to the ground state (n=1).
Barium peroxide decomposes when heated to give BaO and O2. Write the balanced equation for this reaction. How many moles of O2 is formed when 0.500 mole of BaO2 is decomposed
Consider the following thermochemical equations : 8Mg(s) + Mg(NO3)2(s) ? Mg3N2(s) + 6MgO(s) ?H°rxn = -3884 kJ Mg3N2(s) ? 3Mg(s) + N2(g) ?H°rxn = +463 kJ 2MgO(s) ? 2Mg(s) + O2(g) ?H°rxn = +1203 kJ Use the above equations to calculate the ?H°f (in k..
calculate the number of grams of propane c3h8 required to heat all of the water in a 50-gallon hot-water tank from 23.4
Explain how do you find out maximum percent recovery from recrystallization when you are given solubility at 60 C. and 0 C
When a 2.00-g sample of KSCN is dissolved in water in a calorimeter that has a total heat capacity of 1.083 kJ·K-1, the temperature decreases by 0.460 K.
When 83.6 joules of heat is added to 2 grams of water at 10 degrees Celsius, the temperature of the water increases to what value?
A gas-forming reaction produes 1.30 m3 of gas against a constant pressure of 178.0 kPa. Calculate the work done by the gas in joules.
if 100. ml of 1.60 m na2so4 is added to 200. ml of 2.40 m nacl what is the concentration of na ions in the final
Iron metal can be produced in a blast furnace through a complex series of reactions involving reduction of iron(III) oxide with carbon monoxide.overall: iron(III)oxide + carbon monoxide => iron + carbon dioxideUse the equations below to calculate
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