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SpyIntel [72]
3 years ago
14

What is the mass of 5.84 × 10^21 atoms of xenon?

Chemistry
1 answer:
podryga [215]3 years ago
8 0

Answer:

5.84e+21

Explanation:

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the half life of a certain element is 100 days. how many half-lives will it be before only one-fourth of this element reamains
Rama09 [41]

Answer:

200 Days

Explanation:

Usually not so good in chemistry, but this is math!

Half life means in this time half goes away.  What happens when two half lives pass?  half of what was remaining goes away.  Maybe an example will make it more clear.

Say we start with 100 grams.  After the amount of time for the half life to pass completes, we have 50, or half of the original amount.  The half life time passes again and THAT gets cut in half to 25 grams.  this is 1/4 of the original (Hey, what we're looking for.)  Just to make it clear what is happening after another half life 1/8 remains, so it goes from The starting amount to 1/2 to 1/4 to 1/8 and so on, it keeps getting cut in half.

So how many times do we have to cut 1 in half until we get to 1/4?  Twice as was shown before.  Now, two half lives for this element is what?  100+100 days.  So 200 Days.

4 0
3 years ago
If heat is added to a boiling liquid, what happens to the temperature of the liquid?
stealth61 [152]

Answer: C

Explanation:

Answer is "It does not change"

Hope this helps!

4 0
3 years ago
Which options correctly describe characteristics of noble gases? Select all that apply.
ANTONII [103]

This is the only option that correctly describe characterisitics of noble gases.  

All noble gases have a unique atomic fingerprint.


All noble gases have valence shells with 8 electrons but Heilum has only 2 valence electrons.

And all noble gases do not easily react with other elements as they have their outermost shell completly filled so they are highly stable.

All noble gases emits different colored light when electrified.

6 0
3 years ago
Benzene has a specific gravity of 0.88. if it was spilled in a river what would it do?
Gelneren [198K]
As we know,
                    Density of Benzene  =  876 Kg/m³
And,
                    Density of Water       =  997 Kg/m³
So,
     Specific Gravity is calculated as,

                     Specific Gravity  =  Density of Benzene / Density of Water

                     Specific Gravity    =   876 Kg/m³ / 997 Kg/m³

                     Specific Gravity    =  0.878

Every object having specific gravity less than 1 will float on water and if value is greater than 1 then it will sink.

Benzene being non-polar in nature does not mix with water and due to less density it will float on the surface of water.
4 0
3 years ago
Is there more or less air near sea level
vampirchik [111]

there is more air near sea level

7 0
2 years ago
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