Iridium is essentially tied with osmium for the distinction of
being called the “densest element” with...
Iridium is essentially tied with osmium for the distinction of
being called the “densest element” with a density of 22.5 g/cm3.
What would be the mass in pounds of a 1.0 ft x 1.0 ft x 1.0 ft cube
of iridium? (1 lb = 453.6 g)
Osmium (Os) is the densest naturally occurring element. a. What is the density of this element (in g/cm) if we know a single atom of osmium occupies a volume of 13.981 A3? b. What is the radius (in inches) of a sphere of osmium containing 2.831 mol of osmium atoms?
Osmium is the densest element (22.5 g/cm3) in the periodic
table. What is the mass of 0.10 dL of the metal?(a) 0.444 g(b) 2.25 g(c) 22.5 g(d) 225 g(e) 444 g
Osmium is the densest of the naturally occurring elements with a
density of 22.59 g/cm3. You are presented with a cube of
what is claimed to be pure osmium, which measured 2.00 inches on a
side. What weight in pounds would you expect for such a cube of
pure osmium? 1 lb = 453.6 g; 1 in = 2.54 cm
Pure iridium metal is one of the densest elements at 22.6 g/cm3
. Compute the settling velocities of spherical iridium particles of
the given diameters, dp, in the given fluids.
(a) dp = 2 μm in air (T = 293 K, P = 1 atm,
ρa = 1.2 kg/m3 , μa = 0.0181 g m-1
s-1 )
(b) dp = 100 μm in water (ρw = 1.0 g/cm3 ,
μw = 0.010 g cm-1 s-1)
The density of osmium (the densest metal) is 22.57 g/cm3. If a
1.00-kg rectangular block of osmium has two dimensions of 4.00 cm x
4.00 cm, calculate the third dimension (in cm) of the block. Watch
significant figures.
A small 0.11 kg metal ball is tied to a very light (essentially
massless) string that is 0.9 m long. The string is attached to the
ceiling so as to form a pendulum. The pendulum is set into motion
by releasing it from rest at an angle of 60 ∘ with the
vertical.
A) What is the speed of the ball when it reaches the bottom of
the arc?
B)What is the centripetal acceleration of the ball at this
point?...
An element a in a ring R is called nilpotent if there exists an
n such that an = 0.
(a) Find a non-zero nilpotent element in M2(Z).
(b) Let R be a ring and assume a, b ∈ R have at = 0
and bm = 0 for some positive integers t and m. Find an n
so that (a + b)n = 0. (You just need to find any n that
will work, not the smallest!)
(c) Show...
An element a in a field F is called a primitive
nth root of unity if n is the smallest positive
integer such that an=1. For example, i is a primitive
4th root of unity in C, whereas -1 is not a primitive 4th root of
unity (even though (-1)4=1).
(a) Find all primitive 4th roots of unity in F5
(b) Find all primitive 3rd roots of unity in F7
(c) Find all primitive 6th roots of unity in F7...