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Shalnov [3]
3 years ago
5

Can someone please help me with this?

Chemistry
1 answer:
BabaBlast [244]3 years ago
4 0

Answer:

1. Main sequence stars have different masses. The common characteristic they have is their source of energy. They burn fuel in their core through the process of fusing hydrogen atoms into helium.

2. Supergiants are among the most massive and most luminous stars. Supergiant stars occupy the top region of the Hertzsprung–Russell diagram with absolute visual magnitudes between about −3 and −8. The temperature range of supergiant stars spans from about 3,400 K to over 20,000 K.

3. Supergiants develop when massive main-sequence stars run out of hydrogen in their cores.

4. a supernova occur When the pressure drops low enough in a massive star, gravity suddenly takes over and the star collapses in just seconds. This collapse produces the explosion.

5. when a star has reached the end of its life and explodes in a brilliant burst of light

Explanation:

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In the wintertime, you decide to buy a helium balloon at Dollar Tree. It is fully
Gemiola [76]

Answer:

The reason that the balloon shrinks is because when the temperature drops, helium becomes more dense then it already is. So what happens is that its molecules lose energy, slows down and moves closer together to conserve heat and this decreases the volume inside the balloon because the helium molecules are moving closer together, rather than outward toward the shell of the balloon which cause the balloon to swell then shrink. The gas law that causes this to happen is the Charles law.

Explanation:

5 0
3 years ago
Read 2 more answers
How many moles of ions are produced by the dissociation of 1 mol of al2(co3)3?
zloy xaker [14]
Aluminium Carbonate on Dissociation produces Aluminium Ions and carbonate Ions as follow,

                            Al₂(CO₃)₃      →     2 Al⁺³  +  3 CO₃⁻²

Result:
          On dissociation Al₂(CO₃)₃ produces FIVE Ions in total. The Ions produced and there number are as follow;

                                              Al⁺²  =  2

                                            CO₃⁻²  =  3
5 0
3 years ago
Plz help me it a timed test
Shtirlitz [24]

Answer:

B

Explanation:

6 0
3 years ago
People expend energy even when they sit perfectly still. Why?
Murljashka [212]
Because you’re body is using energy to keep you alive. Your breathing takes energy, so does your heart beat.
3 0
3 years ago
Which amino acid and which atom has most to do with myoglobin’s ability to bind o2?.
Effectus [21]

The amino acid and which atom which has most to do with myoglobin’s ability to bind o2 is <u>histidine</u> and <u>haemoglobin</u> respectively

<h3>What is amino acid?</h3>

Amino acids simply refers to those molecular substances which combine together to form proteins. However, they are the end products of protein digestion

So therefore, the amino acid and which atom which has most to do with myoglobin’s ability to bind o2 is histidine and haemoglobin respectively

Learn more about amino acids:

brainly.com/question/1302816

#SPJ1

7 0
2 years ago
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