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3 years ago

Part 1: Describe the mass and surface temperature of the supergiant stars.

Chemistry

1 answer:

Julli [10]3 years ago

3 0

Part 1 :- Super gaint star have mass from 10 to 70 solar masses and brightness from 30,000 upto hundreds of thousand times the solar luminosity
blue super giant surface temperature is 20,000 to 50,000 degree Celsius example :0 Rigel its mass is around 20 times the sun mass it give light which 60,000 sun together give .
part 2 :- HR diagram : hertzsprung -Russel diagram ( attached below)

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what is the differents between the number of electrons in selenium and the number of electrons in aluminum ?

uysha [10]

Answer:

The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus.

8 0

3 years ago

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What is the number of oxygen atoms in a formula unit of Al2(SO4)3?

patriot [66]

No of molecules of Aluminium trisulphate

6.023×10²³

No of moles of each

Al=2
S=3
O=12

Total=17

So no of oxygen atoms

(6.023×10²³/17)×12
4.25×10²³atoms

5 0

2 years ago

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If 25.0 g NO are produced, how many grams of nitrogen gas are used?

ivanzaharov [21]

Based on the assumption that the reaction involves N and O to produce NO, if 25.0 g of NO are produced, the amount of N gas used would be 11.66 grams

<h3>Stoichiometric calculation</h3>

From the equation of the reaction:

N + O ---------> NO

Mole ratio of N to NO is 1:1

Mole of 25.0 g of NO = 25/30.01 = 0.833 moles

Equivalent mole of N = 0.833 moles

Mass of 0.833 moles N = 0.833 x 14 = 11.66 grams

More on stoichiometric calculations can be found here: brainly.com/question/8062886

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2 years ago

A metal tank contains three gases: oxygen, helium, and nitrogen. If the partial pressures of the three gases in the tank are 5.7

bekas [8.4K]

Answer:

P(total) = 15 atm

Explanation:

Given data:

Pressure of O₂ = 5.75 atm

Pressure of N₂ = 7 atm

Pressure of He = 2.25 atm

Total pressure inside tank = ?

Solution:

According to Dalton law of partial pressure,

The total pressure inside container is equal to the sum of partial pressures of individual gases present in container.

Mathematical expression:

P(total) = P₁ + P₂ + P₃+ ............+Pₙ

Now we will solve this problem by using this law.

P(total) = P(O₂) + P(N₂) + P(He)

P(total) = 5.75 atm + 7 atm + 2.25 atm

P(total) = 15 atm

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3 years ago

A crew of six astronauts from the United States and other countries live on the _and conduct space research hoping to have posit

Kitty [74]

Is it the Space station? I can’t think of any other answer

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4 years ago

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