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pshichka [43]
2 years ago
10

Please help , I don't know about big bang I'm sorry

Chemistry
1 answer:
Tresset [83]2 years ago
3 0

1. When our Galaxy was forming why was the center dense?

Answer: <u>Stars are believed to originate as from gas clouds in space. Gravitational forces cause this gas to contract forming a dense center of gravitational force.Eventually this extreme pressure at the center of the star causes nuclear fusion reactions to occur.</u>

2. Why did hydrogen atoms collide in the dense center of the Galaxy?

Answer: <u>Compression would heat the gas to temperatures above 1,000 kelvins. Some hydrogen atoms would pair up in the dense, hot gas, creating trace amounts of molecular hydrogen. The hydrogen molecules would then start to cool the densest parts of the gas by emitting infrared radiation after they collide with hydrogen atoms.</u>

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which elements are likely to have a larger atomic radius than silicon (Si).aluminum (Al)carbon (C)sulfur (S)tin (Sn)
dimulka [17.4K]
D.) Tin (Sn) are likely to have a larger atomic radius than silicon....
7 0
3 years ago
What can help overcome a positive enthalpy of solution and allow a solid
IgorC [24]

Answer: D. An increase in entropy

Explanation:

Entropy is the measure of randomness or disorder of a system. If a system moves from  an disordered arrangement to an ordered arrangement, the entropy is said to increase and vice versa.

For a reaction to be spontaneous, the enthalpy of the solution must decrease and the entropy must increase.

To overcome a positive enthalpy of solution and allow a solid  solute to dissolve in water, an increase in entropy would make the reaction spontaneous as the system would move to a more disordered state.

4 0
2 years ago
How much iron is present in 7.59 g of iron(iii) oxide? answer in units of g?
Verdich [7]
You need the unit of g however you must convert to moles before you can use the mole ratio to find the moles of iron, you used the molar mass of iron to find the grams of iron. since F e 2 o 3 

4 0
3 years ago
During the formation of an ionic compound, the element with the higher ionization energy will gain electrons.
Lesechka [4]
False because you have to take it out and do it right
8 0
3 years ago
You have collected a tissue specimen that you would like to preserve by freeze drying. To ensure the integrity of the specimen,
Reika [66]

Answer:

The maximum pressure is 612.2 Pa

Explanation:

The pressure of the ice (P1) = 624 Pa

The temperature of the ice = 273.16 K

The maximum temperature the specimen = - 5 oC

                                                                     = -5 + 273 = 268K

The maximum Pressure the freeze drying can be will be (P2) = ?

Using Pressure law, which shows the relationship between pressure and temperature.

                        P1 / T1 = P2 / T2

                       P2 T1 = P1 T2

                       P2 = P1 T2 / T1

                       P2 = 624 × 268 / 273.16

                       P2 = 612.2 Pa

The maximum pressure at which drying can be carried out is 612.2 Pa

Check the attached document more explanation.   jjjjggggg

5 0
3 years ago
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