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solniwko [45]
2 years ago
14

Arrange the events In the Ilfe of a star In the correct order.

Chemistry
1 answer:
Ksju [112]2 years ago
8 0

The events in the life of a star in the correct order is as follows: F, B, C, D, E and A.

<h3>What is the life of a star?</h3>

The life of a star refers to the the events that occur in a star from when it formed newly until when it finally dies off.

When stars are newly formed, they are formed from star dust, and when just before they die, the form supernovas.

The several events in the life of a star can be arranged thus:

  • The temperature increases in the center of a nebula, and nuclei begin to fuse.
  • As the nuclear fusion sets off a chain reaction, the nebula gets hotter and brighter and turns into a star.
  • The star stays in the main sequence stage for a long time.
  • The star runs out of hydrogen and turns into a planetary nebula or a supernova, depending on its mass.
  • Heavy elements are created when the supernova explodes.
  • All that remains of the star now is the core. In some cases, the star turns into a black hole

In conclusion, the life of a star is the period of its formation to its burning out or death.

Learn more about life of a star at: brainly.com/question/988039

#SPJ1

Note that the complete question is given below:

Arrange the events in the life of a star in the correct order.

A. All that remains of the star now is the core. In some cases, the star turns into a black hole

B. As the nuclear fusion sets off a chain reaction, the nebula gets hotter and brighter and turns into a star.

C. The star stays in the main sequence stage for a long time.

D. The star runs out of hydrogen and turns into a planetary nebula or a supernova, depending on its mass.

E. Heavy elements are created when the supernova explodes.

F. The temperature increases in the center of a nebula, and nuclei begin to fuse.

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A gold bar is contain 3.0 mol of gold, how many atoms of gold are in the bar
kenny6666 [7]

Answer:

18.066 x 10^23 atoms of Au

Explanation:

ONE mole = 6.022 x 10^23  particles

3   x   6.022 x 10^23

 

6 0
2 years ago
What temperature in kelvin does 60.5 liters of sulfur dioxide occupy if there are 2.5 mol at 0.75 atm??
7nadin3 [17]
 The temperature  in kelvin  does  60.5  liters of sulfur  dioxide  occupy  if there  are  2.5  mole  at 0.75 atm  is   221.07  kelvin 

              Explanation
      This is  calculated using   ideal  gas  equation, that is  PV=nRT
where,  P(pressure)  = 0.75 atm
             V(volume)  = 60.5 L
             n(moles)  = 2.5 mole
             R( gas  constant) = 0.0821 L.atm/mol.k
            T(temperature  =?

by  making   T  the subject   of  the formula  
T  is  therefore =Pv/nR

T= (0.75 atm  x  60.5 L) / (  2.5 molex 0.0821  L.atm/mol.K)  = 221.07 kelvins

6 0
3 years ago
It’s is the same one from my recent ones
UkoKoshka [18]
<h2>9. Given : P + O2 = P2O5</h2>

Balanced Chemical Equation: <u>4</u>P + <u>5</u>O2 = <u>2</u>P2O5

<u>Reactant Product</u>

P = (1) 4 | P = (2) 4

O = (2) 10 | O = (5) 10

Reaction Information

Phosphorus + Dioxygen = <u>Phosphorus Pentoxide</u>

Reaction Type: <u>Synthesis</u>

<h2>10. Given: HCl + NaOH = NaCl + H2O </h2>

<u>Reactant Product</u>

H = 2 | H = 2

Cl = 1 | Cl = 1

Na = 1 | Na = 1

O = 1 | O = 1

<h3>Chemical Equation is already in balance.</h3>

Reaction Information<em>:</em><em> </em><em>Hydrogen Chloride </em>+ <em>Sodium Hydroxide</em> = <em>Sodium Chloride </em>+ <em>Water</em>

Reaction Type<u> </u><u>:</u><u> </u><u>Double Displacement (Acid-Base)</u>

<h3>For more info:</h3>

<u>How to balance chemical equation?</u>

brainly.com/question/15939935

5 0
4 years ago
How many grams of KBr are present in 250.0mL of a 1.20M solution
castortr0y [4]
Molar mass KBr = 119 g/mol

Volume in liters: 250.0mL / 1000 => 0.25 L

n = M x V

n = 1.20 x 0,25 => 0.3 moles of KBr

Therefore:

1 mole KBr ----------- 119 g
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0.3 x 119 / 1 => 35.7 g of KBr 
4 0
3 years ago
Does anyone know a reverse spell
ehidna [41]

Answer:

No

Explanation:

3 0
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