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Butoxors [25]
3 years ago
15

What is a pentadihide?

Chemistry
1 answer:
Anton [14]3 years ago
4 0
It is an alkyl aldehyde
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When iridium-192 is used in cancer treatment, a small cylindrical piece of 192ir, 0.6 mm in diameter and 3.5 mm long, is surgica
Ivan

Iridium-192 is used in cancer treatment, a small cylindrical piece of 192 Ir, 0.6 mm in diameter (0.3mm radius) and 3.5 mm long, is surgically inserted into the tumor. if the density of iridium is 22.42 g/cm3, how many iridium atoms are present in the sample?

Let us start by computing for the volume of the cylinder. V = π(r^2)*h where r and h are the radius and height of the cylinder, respectively. Let's convert all given dimensions to cm first. Radius = 0.03 cm, height is 0.35cm long.

V = π * (0.03cm)^2 * 0.35 cm = 9.896*10^-4 cm^3

Now we have the volume of 192-Ir, let's use the density provided to get it's mass, and once we have the mass let's use the molar mass to get the amount of moles. After getting the amount of moles, we use Avogadro's number to convert moles into number of atoms. See the calculation below and see if all units "cancel":

9.896*10^-4 cm^3 * (22.42 g/cm3) * (1 mole / 191.963 g) * (6.022x10^23 atoms /mole)

= 6.96 x 10^19 atoms of Ir-122 are present.

4 0
3 years ago
A solution contains one or more of the following ions: Ag+, Ca2+, and Fe2+. When sodium chloride is added to the solution, no pr
Ksju [112]

Answer:

the ion present in the original solution is Ca2+

Explanation:

Precipitation reactions occur when cations and anions in aqueous solution combine to form an insoluble ionic solid called a precipitate.

<u>Step1</u> : If we add Nacl to the solution, there is no precipitate formed

⇒The only possible ion that can form a precipate with Cl- is Ag+; since there is no precipitate formed, Ag+ is not present

<u>Step2</u> : If we add Na2SO4 to the solution, a white precipitate is formed

The possible ions to bind at SO42- are Ca2+ and Fe2+

But the white precipitate formed, points in the direction of Ca2+

⇒This means calcium is present

<u>Step3</u> : If we add Na2CO3 to the filtered solution, there is a precipate formed

Ca2+ will bind also with CO32- and form a precipitate

So the ion present in the original solution is Ca2+

6 0
3 years ago
Read 2 more answers
40 points
amm1812

Answer:

I am so confused about this i am so sorry but i cant there is to much going on

Explanation:

7 0
3 years ago
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The definition of products
Feliz [49]
The term "product" refers to the result of one or more multiplications. For example, the mathematical statement would be read " times equals ," where.
7 0
3 years ago
Explain the basic principles involved in X-ray crystallography. Include Bragg’s law in your explanation.
Artist 52 [7]

Answer:

Bragg's law is considered the case of diffraction that gives coherent and incoherent angles when the ray is scattered from the crystal lattice.

Explanation:

Bragg's law is considered the case of diffraction that gives coherent and incoherent angles when the ray is scattered from the crystal lattice.

The Bragg's law is used to determine the crystal structure by explaining the scattering process between the x-ray and crystal surface.

Bagg's law stated that when incident ray incident on the surface of crystal its scattering angle will be the same as incident angle when path difference is equal to the wavelength of ray. This leads to constructive interference.

4 0
3 years ago
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