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3 years ago

This happens in massive star which convert hydrogen into helium?

Chemistry

1 answer:

katovenus [111]3 years ago

6 0

Answer:

nucleosynthesis. A star's mass determines what other type of nucleosynthesis occurs in its core (or during explosive changes in its life cycle).

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2 Points

oee [108]

Answer:

C would be the most best choice for this question.

Thank you.

If you have any questions, feel free to leave a comment and I will get back to it as soon as I can.

-The Spectre

Explanation:

7 0

2 years ago

After decaying for 48 hours, one-sixteenth (1/16) of the original mass of a radioisotope sample remains unchanged. What is the h

Hunter-Best [27]

The half-life of this radioisotope : 12 hr

<h3>Further explanation </h3>

The atomic nucleus can experience decay into 2 particles or more due to the instability of its atomic nucleus.

Usually radioactive elements have an unstable atomic nucleus.

General formulas used in decay:

$\large{\boxed{\bold{N_t=N_0(\dfrac{1}{2})^{t/t\frac{1}{2} }}}$

t = duration of decay

t 1/2 = half-life

N₀ = the number of initial radioactive atoms

Nt = the number of radioactive atoms left after decaying during T time

t=48 hr

$\tt \dfrac{Nt}{No}=\dfrac{1}{16}$

The half-life :

$\tt \dfrac{1}{16}=\dfrac{1}{2}^{(48/t\frac{1}{2} )}\\\\(\dfrac{1}{2})^4=(\dfrac{1}{2})^{48/t\frac{1}{2}}\\\\4=48/t\frac{1}{2}\\\\t\frac{1}{2}=12~hr$

7 0

2 years ago

Match the descriptions below with the graphs. Be sure to explain your answers.

Solnce55 [7]

There are no graphs

7 0

3 years ago

You have 34.1 x 1023 molecules of O2. How many moles of O2 do you have? Fill in the grid. Then, solve the problem and answer the

denis-greek [22]

Number of moles = 5.7 moles of oxygen.

<u>Explanation:</u>

We have to convert number of molecules into number of moles by dividing the number of molecules by Avogadro's number.

Here number of molecules of oxygen given is 34.1 × 10²³ molecules.

Now we have to divide the number of molecules by Avogadro's number as,

Number of moles = $$\frac{number of molecules}{Avogadro's number}$

= $$\frac{34.1}{6.022} \times \frac{10^{23} }{10^{23} }$

= 5.7 moles

So here molecules is converted into moles.

5 0

3 years ago

Which way will the equilibrium shift if you..... cool it to a low temperature?

igor_vitrenko [27]

If you can provide the reaction you are looking at, then we can provide a more satisfactory answer.

If the forward reaction is exothermic, then reducing the temperature where the reaction occurs will shift the equilibrium towards the right. This is because exothermic reactions release heat, and this will counteract the change as stated in Le Chatelier's Principle.

If the forward reaction is endothermic, then reducing the temperature will shift to the left. This occurs as the backward reaction is the exothermic reaction, and by Le Chatelier's Principle, the reaction will favor the reaction that produces more in to counter a reduction in temperature, in this case the backward direction reaction.

5 0

3 years ago

This happens in massive star which convert hydrogen into helium? ​

This happens in massive star which convert hydrogen into helium?