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Akimi4 [234]
3 years ago
7

Condition required for nuclear fusion in the sun?

Chemistry
2 answers:
Schach [20]3 years ago
3 0
The Sun<span> is a main-sequence star, and thus generates its energy by </span>nuclear fusion<span> of hydrogen nuclei into helium. In its core, the </span>Sun<span> fuses 620 million metric tons of hydrogen each second.</span>
Alchen [17]3 years ago
3 0

Extremely high temperature, and high density at the Sun's core allow fusion to occur.   just took the test

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The half-life of radon gas is approximately four days. Four weeks after the introduction of radon into a sealed room, the fracti
maksim [4K]

The fraction of the original amount remaining is closest to 1/128

<h3>Determination of the number of half-lives</h3>
  • Half-life (t½) = 4 days
  • Time (t) = 4 weeks = 4 × 7 = 28 days
  • Number of half-lives (n) =?

n = t / t½

n = 28 / 4

n = 7

<h3>How to determine the amount remaining </h3>
  • Original amount (N₀) = 100 g
  • Number of half-lives (n) = 7
  • Amount remaining (N)=?

N = N₀ / 2ⁿ

N = 100 / 2⁷

N = 0.78125 g

<h3>How to determine the fraction remaining </h3>
  • Original amount (N₀) = 100 g
  • Amount remaining (N)= 0.78125 g
  • Fraction remaining =?

Fraction remaining = N / N₀

Fraction remaining = 0.78125 / 100

Fraction remaining = 1/128

Learn more about half life:

brainly.com/question/26374513

7 0
2 years ago
Iron (III) bromide reacts with sodium hydroxide to produce iron (III) hydroxide and sodium bromide. Write the balanced chemical
valkas [14]
3 NaOH + FeBr3 = 3 NaBr + Fe(OH)3

Hope this helps!!
3 0
3 years ago
Calculate the pressure of 3.2 moles of an ideal gas that occupies a volume of 87 m3 at a temperature of 312 K.
Anestetic [448]

Answer:

                  P  =  0.0009417 atm

Or,

                 P  =  9.417 × 10⁻⁴ atm

Or,

                  P  =  0.0954157 kPa

Or,

                  P  =  0.715677 mmHg (Torr)

Explanation:

Data Given:

                 Moles  =  n  =  3.2 mol

                 Temperature  =  T  =  312 K

                  Pressure  =  P  =  ?

                  Volume  =  V  =  87 m³ = 87000 L

Formula Used:

Let's assume that the gas is acting as an Ideal gas, the according to Ideal Gas Equation,

                  P V  =  n R T

where;  R  =  Universal Gas Constant  =  0.082057 atm.L.mol⁻¹.K⁻¹

Solving Equation for P,

                  P  =  n R T / V

Putting Values,

                  P  =  (3.2 mol × 0.082057 atm.L.mol⁻¹.K⁻¹ × 312 K) ÷ 87000 L

                  P  =  0.0009417 atm

Or,

                 P  =  9.417 × 10⁻⁴ atm

Or,

                  P  =  0.0954157 kPa

Or,

                  P  =  0.715677 mmHg (Torr)

4 0
3 years ago
Read 2 more answers
The metalloid that has five valence electrons in the fourth electron shell is
insens350 [35]
Arsenic, I believe. Metalloids fall in between metals and nonmetals (usually on the bold line separating the two on the periodic table). And since the metalloid in question has four electron shells and five valence electrons in the outermost shell, you can see that this element is arsenic

3 0
3 years ago
Read 2 more answers
Conduction, convection, and radiation are three means by which _____________ may be transferred.
Vaselesa [24]
The correct answer to this question would be heat energy

8 0
3 years ago
Read 2 more answers
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