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worty [1.4K]
3 years ago
10

Which statement describes the difference between chemical reactions and nuclear decay

Chemistry
2 answers:
gogolik [260]3 years ago
4 0

Chemical reactions can result in new compounds, while nuclear reactions can result in new elements.


dezoksy [38]3 years ago
3 0
Chemical reactions might be fast -- burning gasoline, or slow -- rusting. Usually the require two or more reactants. Most of these, along with requiring more than 1 substance, also requires something to get it started ... burning needs a spark to start it.
Nuclear decay only requires 1 thing, the radioactive element. Wait and it spontaneously undergoes decay.
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You have 500,000 atoms of a radioactive substance. After 2 half-lives have past, how many atoms remain?
Aleonysh [2.5K]

Answer:

125000

Explanation:

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2 years ago
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Goryan [66]
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8 0
3 years ago
A 475 cm3 sample of gas at standard temperature and pressure is allowed to expand until it occupies a
Andrej [43]

The final temperature : 345 K

<h3> Further explanation </h3>

Given

475 cm³ initial volume

600 cm³ final volume

Required

The final temperature

Solution

At standard temperature and pressure , T = 273 K and 1 atm

Charles's Law  :

When the gas pressure is kept constant, the gas volume is proportional to the temperature  

V₁/T₁=V₂/T₂

Input the value :

T₂=(V₂T₁)/V₁

T₂=(600 x 273)/475

T₂=345 K

4 0
2 years ago
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frosja888 [35]
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3 0
3 years ago
Draw the Lewis dot structure for RbIO2. Include all hydrogen atoms and nonbonding electrons. Show the formal charges of all atom
Rzqust [24]

Answer : The Lewis-dot structure of RbIO_2  is shown below.

Explanation :

Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule.

In the Lewis-dot structure the valance electrons are shown by 'dot'.

The given molecule is, RbIO_2

As we know that rubidium has '1' valence electrons, iodine has '7' valence electrons and oxygen has '6' valence electrons.

Therefore, the total number of valence electrons in RbIO_2 = 1 + 7 + 2(6) = 20

As we know that RbIO_2  is an ionic compound because it is formed by the transfer of electron takes place from metal to non-metal element.

7 0
3 years ago
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