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Determine the molality of a solution made by dissolving 50.0 g of glucose (C6H12O6, molar mass = 180.1 g/mol) in 294 g of water.
What types of reactions could happen if the materials mixed? What precautions do you need to take with each of these materials?
when the cations Na+ K+ Cs+ are combined with chloride ion in the gas phase to form ion pairs, which pair formation releases the greatest amount of energy? KCL or RbCl, or NaCl or CsCl.
Iron(III) oxide reacts with carbon to give iron and carbon monoxide. How many grams of C are required to react with 16.5 g of Fe2O3?
Magnesium hydroxide is used in several antacid formulations. When it is added to water it dissociates into magnesium and hydroxide ions.
Calculate the hydronium ion concentration and the pH after the addition of 0.25 mL of 0.10 M HCl to each one. Ka of acetic acid = 1.8 x 10-5 Acetic acid/sodium acetate buffer Acetic acid .1M Sodium
Deduce the rate law and rate constant of the reaction from the given experimental data (Hint: calculate the change in concentration of the reactants to at least three decimal places).
The volatile liquid ethyl mercaptan C2H6S is one of the most odoriferous substances known. It can be added to natural gas to make leaks detectable. How many molecules of ethyl mercaptan C2H6S are co
Consider the reaction CuSO4(s) ! CuO(s) + SO3(g) . If G? = -14.6 kJ at 950?C for this reaction, calculate ΔG for an SO3(g) pressure of 50 bar at this temperature.
Metal X was plated from a solution containing cations of X. The passage of 48.25 C deposited 31 mg of X on the cathode. What is the mass of X (in grams) per mole of electrons?
If a sample containing 1.50mL of nitroglycerin (density=1.592g/mL) is detonated, how many total moles of gas are produced?
How much work is done in kilojoules for the reaction of 6.40 of acetylene at atmospheric pressure if the volume change is -2.76 ? & ;
Which would work better for the purpose, magnesium or zinc? Explain your answer based on the oxidation potentials for each metal.
If 76.0 mL of .150 M HCL is needed to neutralize all the NH3 from a 2.25-g sample of organic material, calculate the mass percentage of nitrogen in the sample.
How much heat is required to vaporize 25.5 g of water at 100 C? The heat of vaporization of water at 100 C is 40.7 rm kJ/mole.
how many moles of urea (60.0 g/mol) must be dissolved in 100.00 g of water to give a 2.5 molal solution.
Methane has a heat of fusion of 0.84 kJ/mol and a heat of vaporization of 9.2 kJ/mol. Estimate the value for the heat of sublimation.
Calculate pH and pOH of .050 m solutions of H2CO3 and Al(h20)63+
Show the movements of the electron pair that occur to form the product. Which reactant is the lewis acid? Which is the Lewis base? how do you know?
A 84.0mL volume of 0.25 M HBr is titrated with 0.50 M KOH. Calculate the pH after addition of 42.0mL of KOH.
Write the half-reactions for the following redox reaction 2Li + H2 -> 2LiH
75.00 mL of an aqueous solution of formic acid is titrated with a 0.150 M aqueous solution of NaOH. It is found that 21.25 mL of the NaOH solution is needed to reach the equivalence point. Formic ac
A 2.10 M aqueous soluion of pyridine C6H5N has a pH 0f 9.78. Why are the concentration of these solutions diffferent even though their pH values are the same?
What is the percent by mass of sodium phosphate in a 0.142M Na3PO4(aq) solution that has a density of 1.015g/mol.