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bearhunter [10]
3 years ago
10

How does it’s atomic radius compare to chlorine’s?

Chemistry
1 answer:
Margarita [4]3 years ago
8 0
I do not have a clue.
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the speed limit is posted as 35 km/hr . your speedometer reads that you are going 40 miles/hr. are you speeding?
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3 years ago
Chalcopyrite is an ore with the composition cufes2. what is the percentage of iron in a 39.6 g sample of this ore? answer in uni
iren2701 [21]
<span>Well it depends on percentage by what, but I'll just assume that it's percentage by mass. For this, we look at the atomic masses of the elements present in the compound. Cu has an atomic mass of 63.546 amu Fe has 55.845 amu and S has 36.065 amu Since there are 2 molecules of Sulfur for each one of Cu and Fe, we'll multiply the Sulfur atomic weight by 2 to obtain 72.13 amu So we have not established the mass of the compound in amus 63.546 + 55.845 + 72.13 = 191.521 That is the atomic mass of Chalcopyrite. and Iron's atomic mass is 55.845 So to get the percentage, or fraction of iron, we take 55.845 / 191.521 Which comes out to 29.15% by mass Mass of the sample is not needed for this calculation, but since the question mentions it I would go ahead and check if the question isn't also asking for the mass of Iron in the sample as well, in which case you just find the 29.15% of 67.7g</span>
5 0
3 years ago
Which postmortem parameter reaches a maximum at 12 hours and is gone within 36 to 48 hours?1.rigor mortis2.cloudiness of the eye
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The cloudiness of the eyes increases to a maximum and then decreases. This is because initially, after death, all the muscles relax, dilating the pupil. Some time later, rigor mortis sets in, contracting the pupil. Thus, the cloudiness fades.
3 0
3 years ago
What part of the geocentric model was incorporated in the heliocentric model?
boyakko [2]
C. A central body is the center of the universe.
4 0
2 years ago
What type of Machine is a handrail
Elodia [21]
Hey There!

Here is your answer:

The answer is a compound machine!

Hope this helps!
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