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Copper can be found as a free metal, but most often it is found in a compound with sulfur. The ore is heated with oxygen to change it to copper oxide. Sulfur dioxide gas also is formed. Write a balanced chemical equation for this reaction. [You must include state: (s), (l), (g), (aq).]
agent orange contains about 2 ppm (m/v) of dioxin, a very toxic substance, as an impurity. how many milliliters of agent orange would have to be used in order to place 0.01 g of dioxin in the environment
Can you change the code into java code?
def reflexive(R):
'''
@param R : set containing homogenous elements
'''
result = []
a = []
y = []
for a1, a2 in R:
if (a1 == a2):
result.append((a1,a2))
y.append(a1)
if (a1 not in a):
a.append(a1) #contains list of a0
if (set(a) == set(y)):
print("Reflexive")
return (result, True)
print("Not Reflexive")
return ([] , False)
If the force between +17μC charge and -23μC charge is 0.25671 N, what is the distance between them?
Directions. Solve the following problems. Show your solutions.
I. For the voltaic cell, 2 Na(s) + Fe2+(aq) → 2 Na+
(aq) + Fe(s)
a) Write the two half-reactions.
b) Write the cell notation.
c) Calculate E ° for the cell.
II. Consider the fission reaction 1
0n + 235
92U →
89
37Rb + 3 0
-1e + 3 1
0n + 144
58Ce
How much energy in kilojoules is released per gram of Uranium- 235?
III. For Al-28, calculate the binding energy in kilojoules /mol?
IV. Sketch a portion of the acrylonitrile polymer ( Refer to Table 23.1) assuming it is a
a) head-to-tail polymer
b) head-to-tail, tail-to-tail polymer
A material has a mass of 83 g before abrasion and the abrasive ratio is 1.75. If the area of
abrasion is 23, find the mass after abrasion.
A material has a mass of 187 g and 140 g before and after abrasion, respectively. If the material
has a circular cross-section of 5 cm diameter, find the abrasive ratio.
A material has a mass of 95 g and 68 g before and after abrasion, respectively. If the abrasive
ratio of 1.85, find the area of abrasion.
A solid brass bar 5.0 m long with rectangular cross-section, whose dimensions are 115 mm
by 188 mm is loaded in tension with a pull of 196.77 Mg. After which, it is loaded in
compression with a push of 168.59 Mg. If the load P used to bend the steel bar is the average
of the tensile and compressive load and there is bending and shear in the cross-section,
Calculate the following:
a. Compressive Strength
b. Maximum bending strength (Hint: assume length of the steel is the distance between
supporting ends)
A solid steel bar with rectangular cross-section whose dimensions are 100mm by 175 mm is
loaded in tension with a pull of 186.5Mg. After which, it is loaded in compression with a push of
170Mg. If the load P used to bend the steel bar is the average of the tensile and compressive
load and there is bending and shear in the cross-section, Calculate the following:
a. Tensile Strength
b. Shear Strength
