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Paladinen [302]
3 years ago
6

Balance this nuclear reaction by supplying the missing nucleus: 249/98 Cf +__ --> 263/106 Sg +4 1/0 n

Chemistry
2 answers:
Sholpan [36]3 years ago
5 0
The total atomic number must be the same on each side. The total mass number must be the same on both side. 

<span>On the RHS, for the mass number, we have 257 + 4 = 261 (the 4 comes from the 4 neutrons). That means the mass number of the missing piece on the LHS is 261 - 247 = 14. </span>

<span>One the RHS, for the atomic number we have a total of 104 since the 4 neutrons are all neutral. On the LHS, we have this: 104 - 98 = 6. </span>

<span>The missing piece is a nucleus of carbon 14. Done in your style, it is 14/6C</span>
jasenka [17]3 years ago
5 0

Answer: the missing nucleus is an isotope of oxygen 18/8 O

Explanation:

Since the reacting mass must be equal to the resulting mass

That is right hand side must be equal to the left

We check the total number of reacting moles in the equation

On the right hand we have 267/106

On the left hand side we have 249+x/98+x

Equation both we have

249+ x/98+y = 267/106

Therefore x = 18

y = 8

This is an isotope of oxygen

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Answer:

Evaporation happens when a liquid substance becomes a gas. When water is heated, it evaporates. The molecules move and vibrate so quickly that they escape into the atmosphere as molecules of water vapor.

Explanation:

7 0
3 years ago
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Air is made of nitrogen, carbon dioxide, and small amounts of other gases. What is the pressure of O₂, total is 1 atm if PN₂ = 5
Stolb23 [73]

Answer:

The pressure of O₂ is 0.8 atm.

Explanation:

The pressure exerted by a particular gas in a mixture is known as its partial pressure. So, Dalton's law states that the total pressure of a gas mixture is equal to the sum of the pressures that each gas would exert if it were alone:

PT = PA + PB

This relationship is due to the assumption that there are no attractive forces between the gases.

In this case:

PT=Pnitrogen + Pcarbon dioxide + Pother gases

Being:

  • Pnitrogen: 593.4 mmHg
  • Pcarbon dioxide: 3 mmHg
  • Pother gases: 7.1 mmHg

and replacing:

PT= 593.4 mmHg + 3 mmHg + 7.1 mmHg

you get:

PT= 603.5 mmHg

Being 760 mmHg= 1 atm, you get:

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<u><em>The pressure of O₂ is 0.8 atm.</em></u>

6 0
3 years ago
8. How many atoms of cobalt are in a 0.39 mole sample of CoC
Debora [2.8K]

8.98

×

N

A

 

cobalt atoms

Explanation:

N

A

,

Avogadro's number

specifies  

6.0221

×

10

23

individual particles. It is simply another collective number like a dozen, or a score, or a gross.  

N

A

has the property that  

6.0221

×

10

23

individual cobalt atoms has a mass of  

58.93

⋅

g

. How did I know that? Did I have it memorized?

So the quantity is  

≈

 

54

×

10

23

cobalt atoms.

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3 years ago
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Ostrovityanka [42]

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miv72 [106K]

Answer:

true

Explanation:

Materials science is an interdisciplinary field involving the properties of matter and its applications to various areas of science and engineering. It includes elements of applied physics and chemistry, as well as chemical, mechanical, civil and electrical engineering.

and we all know matter involve solid liquid or gas

7 0
3 years ago
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