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Problem- Suppose that the atomic mass unit (amu) had been defined as one-twentieth of the average mass of an atom of carbon instead of one-twelfth of the mass of an atom of carbon-12. What would the average atomic mass of aluminum be on this new scale?
What would the value of Avogadro's number be on this new scale?
Show all work, use additional paper if necessary.
A solution of ammonia and water contains 4.50×1025 water molecules and 5.30×1024 ammonia molecules. How many total hydrogen atoms are in this solution?
Problem- The equilibrium constand for the reaction: AgBr(s)= Ag(aq)+Br(aq) is the solubility product constant, Ksp=7.7x10^13 at 25C. Calcualte delta G for the reaction when ag = 1x10^-2 M and Br= 1.0x10^-3 M. the answer is 40.6 kJ/mol.
A chemist burns a a saltine cracker in a calorimeter containing 2.0 kg of water. The water temperature increases from 25.0°C to 29.7°C. Calculate the heat content of the cracker in J per cracker.
Explain what are the masses of P4O6 and P4O10 that will be produced by the combustion of 2g of P4 in 2 g of oxygen leaving no P4 and O2
3.00 g of NaOH are dissolved in 100.0 g of water in a coffee cup calorimeter. The temperature change is +7.50 degrees celcius. Calculate the enthalpy change involved in the process.
To find the pKa of X-281, make a 0.089M test solution of X-281. Explain the pH of the solution is determined to be 3.00. Define what is the pKa of X-281
Aluminum will act as the stronger reducing agent and iron will act as the stronger oxidant. In the spontaneous reaction, the oxidation number of iron will increase.
Problem- Which of the following represents a 100 ppm solution of quinine sulfate. 100 mg of quinine sulfate in 1 liter of water
Write a mechanism for the reaction of an alkyl halide with alcoholic silver nitrate which depicts the type of substitution which occurs. Explains how this mechanism accounts for the relative rate of reactivity of 1°, 2°, and 3° halides in this rea..
Consider the two diagrams showing the energies (boxes) of each of four A particles and four B particles shown below. The dotted lines represent the allowed energies of each particle.
what are the boiling point. and freezing point of a 2.47 molal solution of naphthalene in benzene? the boiling point
A piece of magnesium (mass=16.2 grams) reacts completely with 10.7 grams of oxygen. In the second reaction you have 61.4 grams of magnesium and 103.7 grams of oxygen
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