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Given the subsequent data for the length of a side of the unit cell for compounds that crystallize in the rock salt structure, find out the cation radii: MgSe (545pm), CaSe (591 pm), SrSe(623pm), BaSe (662 pm). It is known that the Se2-ions are in contact in MgSe
Polyethylene is a polymer consisting of only carbon and hydrogen. If 2.300 g of the polymer is burned in oxygen it produces
What are the units for k in the rate expression (time unit is seconds) for a reaction with the following rate law? Rate = k[X]1[Y]0[Z]0
The general rate law is: rate=k[A]^2. How long is the third half-life of the reaction if [A]0 is 0.080M and the first half life is 22 min
On average, how many collisions between nitrogen molecules and oxygen molecules will occur in one second in 1.00 cm3 of air at 25oC and 1.00 bar
Some physical properties of water are shown below. freezing point 0.00°C boiling point 100.00°C Kf 1.86°C/m Kb 0.512°C/m What is the freezing point of a solution of calcium chloride that contains 26.0 g CaCl2 dissolved in 330. g of water
The generic metal hydroxide M(OH)2 has Ksp= 6.64x10^-18. (Note: In this particular problem, because of the magnitude of the Ksp and the stoichiometry of the compound, the contribution of OH from water can be ignored. However, this may not always b..
A process stream contains mostly light species 1 and heavy species 2 . A relatively pure liquid stream containing mostly 2 is desired, obtained by a single-stage liquid/vapor separation
Tartaric acid is the white, powdery substance that coats sour candies such as Sour Patch Kids. Combustion analysis of a 12.01- sample of tartaric acid-which contains only carbon, hydrogen, and oxygen-produced 14.08 and 4.32.
Calculating the Equivalent Weight of an Unknown Substance, An unknown organic carboxylic acid, mp = 139-141 degrees Celsius, is burned with a yellow, sooty flame. The sodium fusion test showed that nitrogen was present.
What are the arguments in favor of the hypothesis that the spliceosome is a ribozyme. How could you test this hypothesis
An antacid tablet contains 0.1 g of magnesium hydrogencarbonate, Mg(HCO3)2. What mass of stomach acid, HCl, will it neutralise? The reaction between Mg(HCO3)2 and HCl is: Mg(HCO3)2 + 2HCl → MgCl2 + 2CO2 + H2O
draw a lewis structure of the molecule and indicate the number of bonds and orbitals used in bonding. Show electron configurations of the central bonding atom in both the unhybridized and hybridized states.
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