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Alecsey [184]
3 years ago
12

Phenomenon: If an astronaut throws a wrench in outer space with no other forces acting on it, the wrench will continue moving fo

rever.
1. Use what you have learned to explain this phenomenon.
Chemistry
2 answers:
Llana [10]3 years ago
7 0
Yes I agree with that answer:)
Dafna1 [17]3 years ago
5 0

Answer:

You see the astronaut is traveling 4.76 miles/second horizontally, so if he throws, say, a wrench away from Earth, it only appears to the astronaut to be going straight away. Actually, however, it is going slowly “up” and quickly 4.76 miles/second sideways.

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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.

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2 years ago
4. Nitrogen and oxygen gases react to form dinitrogen monoxide gas (N2O). What volume of O, is
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