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Anuta_ua [19.1K]
3 years ago
12

How did the elements begin to stratify?

Chemistry
1 answer:
Bogdan [553]3 years ago
8 0

Answer:

The process of elemental stratification relies on the diffusion velocity, which causes the migration of the different chemical elements within stars.

Explanation:

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250 g H 2 SO 4 completely reacted with aluminum?
Rasek [7]

Answer: 290 g of aluminium sulphate is produced.

Explanation:

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}    

\text{Moles of} H_2SO_4=\frac{250g}{98g/mol}=2.55moles

The balanced chemical reaction is:

2Al(s)+3H_2SO_4(aq)\rightarrow Al_2(SO_4)_3(aq)+3H_2(g)

According to stoichiometry :

3 moles of H_2SO_4 produce  = 1 mole of Al_2(SO_4)_3

Thus 2.55 moles of H_2SO_4 will require=\frac{1}{3}\times 2.55=0.85moles  of Al_2(SO_4)_3

Mass of Al_2(SO_4)_3=moles\times {\text {Molar mass}}=0.85moles\times 342g/mol=290g

Thus 290 g of aluminium sulphate is produced.

3 0
3 years ago
How many electrons does ga lose to achive noble gas arrangement?
Alchen [17]
Gallium has 31 electrons (₃₁Ga 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p¹) and if loses 13 electrons, gallium would have configuration of noble gas argon with 18 electrons (₁₈Ar 1s² 2s² 2p⁶ 3s² 3p⁶), but that is not possible, so gallium only loses three electrons and has electron configuration:
₃₁Ga³⁺ 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰.
3 0
3 years ago
What else is produced during the combustion of propane, C3Hg?<br> C3H8 +502 - 3C02 + 4
Finger [1]
The products of a combustion reaction is always CO2 + H20, then you would balance it out with the whole equation.

In this case it would be:

C3H8 + O2 -> CO2 + H2O

Balanced:

C3H8 + 5O2 -> 3CO2 + 4H2O

8 0
3 years ago
An air sample consists of oxygen and nitrogen gas as major components. It also contains carbon dioxide and traces of some rare g
jekas [21]

Explanation:

A mixture is defined as the substance that contains two or more different number of substances that are physically mixed together.

For example, a mixture of air which contains oxygen, nitrogen and other gases.

A mixture in which solute particles are unevenly distributed into the solvent then it is known as a heterogeneous mixture.

For example, sand in water is a heterogeneous mixture.

A homogeneous mixture is defined as the mixture in which solute particles are evenly distributed in a solvent.

A homogeneous mixture is a clear solution.

For example, salt dissolved in water is a homogeneous mixture.

A solution is defined as the substance in which two or more substances are mixed together.

A compound is defined as the substance that contains two or more different elements that chemically combined together in a fixed ratio by mass.

A element is defined as the substance that contains only one type of atoms.

For example, a piece of sodium element will contain only atoms of sodium.

Whereas a pure substance is defined as the substance which contains only one type of molecule or one type of atom.

For example, O_{2}, N_{2} etc are pure substances.

Thus, we can conclude that the terms which could be used to describe the given sample of air is as follows.

  • pure chemical substance.
  • heterogenous mixture.
  • mixture.
4 0
3 years ago
Which of the following best describes the main function of the nervous system?
Svetach [21]
C, because the nervous system takes in information through our senses, processes the information and triggers reactions, such as making your muscles move or causing you to feel pain. For example, if you touch a hot plate, you reflexively pull back your hand and your nerves simultaneously send pain signals to your brain.
7 0
3 years ago
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