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How do you solve a chemistry problem like this: equal volumes of neon and another noble gas mixed together at STP. The density of the sample is measured at 2.30g/L. Determine the mass of one mole of the mixture and identify the other noble gas.
Calculate the density of Al from this information. What is the planar density of atoms in the (110) plane (and sketch how they are arranged)
how many grams of urea must be added to enough water to obtain 115 ml of a solution with an osmotic pressure of 2.7 atm at 35 degrees celsius
Pure copper may be produced by the reaction of copper(I) sulfide with oxygen gas as follows: Cu2S(s) + O2(g) 2Cu(s) + SO2(g) If 0.680 kg of copper(I) sulfide reacts with excess oxygen, what mass of copper metal may be produced
if the barometric pressure is 784 torr and the experiment is carried out at 25 oc what is the pressure of the gas
A certain constant-pressure reaction is nonspontaneous at 45oC. The entropy change for the reaction is +72 J/K. What can you conclude about the sign and magnitude of the enthalpy
delta H=483.6 kJ/mol If 2.0 moles of H2O(g) are converted to H2(g) and O2(g) against a pressure 1.0 atm at 145 degrees C, what is the delta E for this reaction?
the reaction shown below occurs and the temperature of the resulting solution rises from 22.00°C to 61.16°C. If the specific heat of the solution is 4.18 J/(g ? °C), calculate delta H for the reaction, as written. Ba+2H2O--->Ba(OH)2+H2 Delta H?
Consider 48.5 mL of a solution of weak acid HA (Ka = 1.00 * 10-6), which has a pH of 4.350. What volume of water must be added to make the pH = 6.000?
A mixture of 6.00 g He and 22.0 g Ne has a pressure of 530. mm Hg. What is the partial pressure of each of the gases?
How many grams of sodium formate, NaCHO2, would have to be dissolved in 1.3 L of 0.45 M formic acid (pKa 3.74) to make the solution a buffer for pH 3.75
the solubility of n2 in blood at 37 oc and at a partial pressure of 0.80 atm is 5.6 x 10-4 moll. a deep-sea diver
Write a balanced chemical equation for the reaction between Mn2O3 and CN - in basic solution. The skeleton ionic reaction is given below.
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