Compute the atomic packing factor for cesium chloride
Compute the atomic packing factor for cesium chloride
Chemistry
Compute the atomic packing factor for cesium chloride assuming thatthe ions
touch along the cube diagonals. Ionic radii ofCs+ and Cl- are 0.170 nm and
0.181 nm,respectively
Describe in detail the molecular formula of the compound
Describe in detail the molecular formula of the compound
Chemistry
A solution contains 10.90g of unknown compound dissolved in 50.0mL of water.
(Assume a density of 1.00 g/mL for water.) The freezing point of the solution
is -6.53C. The mass percent composition of the compound is 38.70% C, 9.74% H,
and the rest is O.
What is the molecular formula of the compound?
Explain the half-reactions and the respective standard
Explain the half-reactions and the respective standard
Chemistry
Based on the half-reactions and their respective standard reduction potentials
below, which addition to an aqueous solution containing Fe(NO3)2 will result
in a reaction under standard-state conditions?
O2(g) + 4 H+ +4 e- ? 2 H2O(l) 1.23 V
Fe3+(aq) + e- ? Fe2+(aq) 0.77 V
Cu2+(aq) + 2 e- ? Cu(s) 0.34 V
2 H+(aq) + 2 e- ? H2(g) 0.00 V
Ni2+(aq) + + 2 e- ? Ni(s) -0.26 V
Fe2+(aq) + 2 e- ? Fe(s) -0.45 V
A) aqueous copper(II) acetate
B) hydrogen gas
C) nickel wire
D) oxygen gas
A galvanic cell consists of a Ni2+/Ni half-cell and a standard hydrogen
electrode. If the Ni2+/Ni half-cell standard cell functions as the anode, and
the standard cell potential is 0.26 V, what is the standard reduction
potential for the Ni2+/Ni half-cell?
A) +0.26 V
B) -0.26 V
C) +0.13 V
D) -0.13 V
Explain how can grains in a silo spontaneously explode
Chemistry
Explain how can grains in a silo spontaneously explode
How can grains in a silo spontaneously explode?
How is it that corn or any other grain can explode in a silo on it’s own? How
could a natural gas leak just cause corn to explode in a silo? What chemical
reaction is going on here?
Explain hypothetical elementary step reaction at equilibrium
Chemistry
Explain hypothetical elementary step reaction at equilibrium
For the following hypothetical elementary step reaction at equilibrium: A in
equilibrium with B, and from the ARrhenius equation k= A e^(-Ea/RT), derive
the equation : Ln(K1/K2)= delta H/R(1/T2 – 1/T1) in any one of it’s forms
What is molarity of the solution after the water evaporates
What is molarity of the solution after the water evaporates
A student makes 215 mL of a 3.15M solution of Na2SO4. he then forgets to seal
it and some water evaporates overnight. When he comes back int he morning, the
volume of the solution is only 205 mL. What is the molarity of the solution
after the water evaporates?
Explain precipitate only form when two solutions are mixed
Does precipitate only form when two solutions are mixed? Or could a solid and
an aq solution produce a precipitate?
For example: Mg (s) + CuSO4 (aq) -> MgSO4 (aq) + Cu (s)
Does the Copper count as a precipitate in this reaction?
Explain what is the value of the equilibrium constant
Chemistry
Explain what is the value of the equilibrium constant
Proceeds at a certain temperature until the partial pressures of H2O, H2, and
O2 reach 0.065 atm, 0.0070 atm, and 0.0040 atm respectively. What is the value
of the equilibrium constant at this temperature
Explain the freezing point of pure benzene
Explain the freezing point of pure benzene
What is the molar mass of a nonpolar molecular compound if 5.52 grams
dissolved in 36.0 grams of benzene begins to freeze at -1.87 °C? The freezing
point of pure benzene is 5.50 °C and the freezing point depression constant,
Kfp, is -5.12 °C/m.
Describe the shift in roman empire
Describe the shift in roman empire
First, describe the shift in the Roman Empire that created Byzantium in the
East and what would eventually become Europe in the West and explain the
impact of this political, religious, and social split on the art produced in
these regions in this era. Provide specific examples of particular works of
art or architecture to illustrate your points. Second, trace the subsequent
development of art in the East and the West from the Early through the High
and Late Middle Ages by citing specific works of art or architecture and
describing characteristic features these works exemplify. Be sure to include
the each of the following terms in your discussion: