What is the molar mass of Al2(SO4)3?150.03 g/mol 278.03 g/mol 342.17 g/mol 450.09 g/mol

Answers

Answer 1

Answer:

Answer:

342.17 g/mol

Explanation:

Molecular formulas is the actual number of atoms of each element in the compound. Molecular mass is the sum of the mass of each element which is present in the molecular formula is multiplied by their subscript which appear in the molecular formula.

Given,

The formula is = $Al_2(SO_4)_3$

Mass from the formula = 2×Molar mass of Aluminium + 3×Molar mass of sulfur + 12×Molar mass of Oxygen

Molar mass of Aluminium = 27.00 g/mol

Molar mass of sulfur = 32.06 g/mol

Molar mass of Oxygen = 15.99 g/mol

So,

Mass from the formula = 2×27.00 + 3×32.06 + 12×15.99 g/mol ≅ 342.17 g/mol

Answer 2

Answer:

The molar mass of $\rm Al_2(SO_4)_3$ is 342.17 g/mol. The correct answer is option C.

Molar mass is the mass of one mole of a substance. It is expressed in units of grams per mole (g/mol).

To calculate the molar mass of $\rm Al_2(SO_4)_3$ , we need to add up the atomic masses of all the atoms in one formula unit.

So, the molar mass of $\rm Al_2(SO_4)_3$ can be calculated as follows:

Molar mass = (2 × atomic mass of Al) + (3 × atomic mass of S) + (12 × atomic mass of O)

= (2 × 26.98 g/mol) + (3 × 32.07 g/mol) + (12 × 16.00 g/mol)

= 342.17 g/mol

Therefore, the answer is option C. 342.17 g/mol is the molar mass of $\rm Al_2(SO_4)_3$ .

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According to the quantum-mechanical model for the hydrogen atom, which electron transitions produces light with the longer wavelength: 2p→1s or 3p→1s?

Answers

Answer:2p→1s

Explanation:

Frequency is inversely proportional to wavelength. The higher the frequency, the shorter that wavelength. The smaller the frequency the longer the wavelength. The frequency of light associated with 2p→1s is less than the frequency of light associated with 3p→1s since the latter represents transition from a much higher energy level. It follows that the wavelength associated with the former will be longer since its frequency is lesser. This deduction follows from our argument about the inverse relationship between frequency and wavelength.

Which value is most likely to be the pH of a salt that is formed by the reaction of a strong acid and a weak base?2.0
7.0
8.0
10.0

Answers

Answer: 2.0 (acidic solution)

Explanation: When a salt is formed by the reaction of strong acid and a weak base , it will be acidic in nature and thereby its pH will be less than 7.

In the process, conjugate acid will be formed which will react with water to give the hydronium ion (H_{_{3}}O ^{+})

Thus as the positive ion species is increasing, it will make the solution acidic in nature.

The pH value of a salt that is formed by the reaction of a strong acid and a weak base is: 2.0 (acidic solution)

Meaning of pH Value

pH value is a value on the pH scale that tells us how acidic or basic a solution can be.

When a salt is formed by the reaction of strong acid and a weak base , it will be acidic in nature and thereby its pH will be less than 7.

In conclusion, The pH value of a salt that is formed by the reaction of a strong acid and a weak base is: 2.0 (acidic solution)

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Atoms in a stay in a fixed position and have no freedom to move.

Answers

If atoms stay in a fixed position that means they are a solid

Which one of the following statements is correct?A. An electron has a negative electrical charge.
B. An electron has a neutral electrical charge.
C. An electron is much larger than an atom.
D. An electron is located inside the nucleus of an atom.

Answers

Answer: Option (A) is the correct answer.

Explanation:

An atom consists of three sub atomic particles. These particles are protons, electrons and neutrons.

Protons have a positive charge. Whereas neutrons have no charge. On the other hand, electrons have a negative charge.

Thus, we can conclude that out of the given options, an electron has a negative electrical charge is the correct statement.

How is Carbon obtained and how is it separated from other substances nearby?

Answers

Carbon is a naturally occurring element that can be obtained from various sources, both organic and inorganic. It is separated from other substances by Filtration, Distillation, and Chemical Reactions.

Carbon is the fourth-most abundant element in the universe and is a key component of all known life forms. Here are some common methods for obtaining and separating carbon from other substances:

Organic Sources: Carbon is a fundamental element in organic compounds, which are compounds containing carbon atoms bonded to hydrogen and other elements. Organic sources of carbon include:

Fossil Fuels: Coal, oil, and natural gas are rich in carbon. Carbon can be obtained from these sources through processes like combustion, pyrolysis, or gasification.

Biomass: Plant and animal matter, such as wood, leaves, and agricultural residues, contain carbon. Carbon can be extracted from biomass through processes like carbonization or fermentation.

Inorganic Sources: Carbon can also be obtained from various inorganic sources:

Carbonates: Minerals like limestone (calcium carbonate) and dolomite contain carbon in the form of carbonate ions. Carbonates can be thermally decomposed to release carbon dioxide gas, which can then be captured and processed.

Graphite and Diamond: These are naturally occurring forms of carbon. Graphite can be obtained from certain rocks and is used in various industrial applications. Diamonds, although much rarer, are another crystalline form of carbon.

Separation from Other Substances:

Filtration: If carbon is present in a solid mixture, it can be separated using filtration. A porous material (filter paper or a sieve) is used to separate solid carbon particles from other substances based on particle size.

Distillation: If carbon is mixed with liquids that have different boiling points, distillation can be used. The mixture is heated, and the component with the lower boiling point (liquid) vaporizes first, while carbon remains in the original container.

Chemical Reactions: Carbon can be separated from other substances through chemical reactions. For example, carbonates can be treated with acid to produce carbon dioxide gas, leaving behind other components.

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Answer:

Carbon products are obtained by heating coal (to give coke), natural gas (to give blacks), or carbonaceous material of vegetable or animal origin, such as wood or bone (to give charcoal), at elevated temperatures in the presence of insufficient oxygen to allow combustion.

Explanation:

What is the empirical formula of a compound that is 79.8% carbon and 20.2% hydrogen?