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Densities are calculated by first determining the mass of the metal in grams, then submerging the metal into a known volume of water and measuring the displaced volume of the water in mL. The density is simply the mass divided by the displaced volume (g/ml)
Lets say an unknown metal has a mass of 32.6 grams and when submerged it displaced 4.15 mL of water.
Calculate the density of the metal a determine its identity?
The Molecular Orbital Theory in Physical Chemistry. What does point symmetry mean and what does it have to do with bonding/anti-bonding
The work function for metallic rubidium is 2.09eV. Calculate the kinetic energy and the speed of electrons ejected by light with wavelength of (a) 650 nmand (b) 195nm.
compute the mass of salt required to bring the freezing point of 200 ml of h2o from 0 degrees c to -5 degrees c.when a
Question- What problems would occur if the urea were added to a strongly acidic solution. What happens to the nucleophile in strong acid. What problems would occur if urea were added to a basic solution. See isocynaic acid formation requirements
a wooden object from the site of an ancient temple has a carbon-14 activity of 13.0 counts per minute compared with a
Problem- Sucrose (table sugar) has the formula C12H22O11 (molar mass= 342.30) and a food value of 6.49 kj/g. Determine the calorimeter constant of the calorimeter in which the combustion of 2.040g of sucrose raises the temperature by 2.08 C
Explain what are the possible consequences of having water mixed with the hexane-titration sample in? Would the presence of hexane modify the results of the water-titration in Titrating the Water Layer
If a solution of Na2CO3 has a pH of 10. The CO32- on is the conjugate base of the HCO3- ion. State the net ionic equation for the reaction which makes a solution of Na2CO3 basic.
if you have 1 gram of - ethyl lactate and purify it with an enantiomeric excess of 85 yields wihout any loss of
The standard change in Gibbs free energy is deltaG= -32.8kJ/mol. What is deltaG for this reaction at 298K when the partial pressures are PNO= .200atm, PO2= .100atm, and PNO3= .850atm
an aerosol can has a gas pressure of 144 kpa at 293 k. calculate the pressure when the can is heated to 425
what is the final concentration of naoh when 50.0 ml of .200 m naoh is added to 50.0 ml of 0.500 m
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