All categories

2 years ago

Condition required for nuclear fusion in the sun?

2 answers:

3 0

The Sun is a main-sequence star, and thus generates its energy by nuclear fusion of hydrogen nuclei into helium. In its core, the Sun fuses 620 million metric tons of hydrogen each second.

Alchen [17]2 years ago

3 0

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

You might be interested in

0.50 g of hydrogen chloride (HCl) is dissolved in water to make 4.0 L of solution. What is the pH of the resulting hydrochloric

svlad2 [7]

Explanation:

Given the mass of HCl is ---- 0.50 g

The volume of solution is --- 4.0 L

To determine the pH of the resulting solution, follow the below-shown procedure:

1. Calculate the number of moles of HCl given by using the formula:

$number of moles of a substance=\frac{given mass of the substance}{its molecular mass}$

2. Calculate the molarity of HCl.

3. Calculate pH of the solution using the formula:

$pH=-log[H^+]$

Since HCl is a strong acid, it undergoes complete ionization when dissolved in water.

$HCl(aq)->H^+(aq)+Cl^-(aq)$

Thus, $[HCl]=[H^+]$

Calculation:

1. Number of moles of HCl given:

$number of moles of a substance=\frac{given mass of the substance}{its molecular mass}\\=0.50g/36.5g/mol\\=0.0137mol$

2. Concentration of HCl:

$Molarity of HCl=\frac{number of moles of HCl}{its molar mass}\\=\frac{0.0137 mol}{4.0 L} \\= 0.003425 M$

3. pH of the solution:

$pH=-log[H^+]\\=-log(0.003425)\\=2.47$

Hence, pH of the given solution is 2.47.

3 0

3 years ago

Different isotopes of a particular element contain the same number of

zimovet [89]

Electrons and protons, but not neutrons.

8 0

3 years ago

Two trays of lasagna are identical except for their thermal energies.

Akimi4 [234]

Answer:

the one with less thermal energy

Explanation:

thermal energy is heat

7 0

2 years ago

Read 2 more answers

Theoretically how many moles of carbonic acid will be produced by the 3.00 g sample of NaHCO3

yaroslaw [1]

NaHCO3 = 22.99 + 1.008 + 16(3) = 83.99 g/mol
Na = 22.99g/83.99 g weight of molecule =.2727 or 27.27% 
3.0 g* .2727 = 0.8211 grams of sodium in sample of NaHCO3

0.8211 grams Na + 1.266 grams Cl = 2.087 grams

4 0

2 years ago

Read 2 more answers

For a constant waves speed,wavelength,of the wave increases with a(n)______

pochemuha

Answer:

higher frequency

Explanation:

8 0

2 years ago