CHEMISTRY HIGH SCHOOL

Which compound is a member of the same homologous series as C3H8?(1) CH4 (3) C5H8
(2) C4H8 (4) C6H10

Answers

Answer 1
Answer:

The homologous series to which C3H8 belongs are the alkanes hence it is in the same group as CH4.

What is a homologous series?

The term homologous  series refers to a family of molecules. The molecules in this family have the same functional group and differ from each other by -CH2-group.

The homologous series to which C3H8 belongs are the alkanes hence it is in the same group as CH4.

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Answer 2
Answer: CH4 is the compound of a member of the same homologous series as C3H8.

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Calculate the mass percent composition of sulfur in Al2(SO4)3.

Answers

The molar mass of aluminum sulftae is 342.14 g/mol.

Since the subscript shows that there are 3 sulfurs within the substance, the total mass of sulfur is 96.21g/mol

Now take the mass of the sulfur and divide it by the molar mass of aluminum sulfate, then multiply by 100:
(96.21/342.15)(100) = 28.1% mass composition of sulfate

What is required for reactants to form bonds?energy output
energy input
equilibrium
exchange reaction

Answers

Energy input is required for reactants to form bonds.

Which substance can be decomposed by chemical means?(1) ammonia (3) phosphorus
(2) oxygen (4) silicon

Answers

\boxed{\left( 1 \right){\text{ ammonia}}} is the substance that can be decomposed by chemical means.

Further Explanation:

The pure form of matter is defined as substance but the mixture is termed as the combination of atoms and molecules.

Classification of substances:

(a). Element

It is a type of pure substance and is the simplest form that cannot be broken down by any chemical means. Copper, iron, and aluminium are some of the examples of elements.

(b) Compound

It is composed of two or more different elements that are held together by chemical bonds. These can be decomposed into their respective constituents. Compounds have no similarity in properties with those of their constituent particles. NaCl, {\text{C}}{{\text{O}}_{\text{2}}} and {\text{N}}{{\text{H}}_3} are examples of compounds.

(1) Ammonia contains one nitrogen and three hydrogen atoms so it is a compound. Since compounds can be decomposed chemically, ammonia is also decomposed by chemical means.

(2) Oxygen (O) is an element so it is the simplest form in which it can exist. Therefore it cannot be decomposed by chemical means.

(3) Phosphorus (P) is an element so it is the simplest form in which it can exist. Therefore it cannot be decomposed by chemical means.

(4) Silicon (Si) is an element so it is the simplest form in which it can exist. Therefore it cannot be decomposed by chemical means.

Learn more:

  1. Give an example of a two-phase mixture: brainly.com/question/838401
  2. Which sample is a pure substance? brainly.com/question/2227438

Answer details:

Grade: High School

Subject: Chemistry

Chapter: Elements, compounds, and mixtures

Keywords: substance, ammonia, oxygen, phosphorus, silicon, element, compound, chemical means, decomposed, broken down, simplest form.

Final answer:

Ammonia is a compound composed of nitrogen and hydrogen, and as such, can be chemically decomposed into these elements. Oxygen, phosphorus and silicon, being elements, cannot be decomposed by chemical means.

Explanation:

In the context of chemistry, a substance can be decomposed by chemical means if it is a compound. Compounds are composed of two or more different elements and can be broken down into those elements through chemical reactions. In the given options, (1) ammonia is a compound, composed of nitrogen and hydrogen elements. Therefore, ammonia can be chemically decomposed into its constituent elements. In contrast, oxygen, phosphorus, and silicon are all elements, which means they cannot be decomposed further by chemical means.

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All fossil fuels contain this element. iron hydrogen copper magnesium

Answers

Answer : Option B) Hydrogen

Explanation :

All fossil fuels contains hydrocarbons in it. Amongst the given options hydrogen is the correct answer. Except that it contains carbon in it. Hydrocarbons are those class of compounds which contains hydrogen and carbon as element in it.

      They are considered to be good fuels because they naturally bring out complete combustion as they contain hydrogen and carbon in its compound form.
B)Hydrogen is the answer.......

What is the concentration of a solution, in parts per million, if 0.02 gram of Na3PO4 is dissolved in 1000 grams of water?(1) 20 ppm (3) 0.2 ppm
(2) 2 ppm (4) 0.02 ppm

Answers

ppm = mass of solute in mg / mass of solvent in kg

0.02 x 1000 = 20 mg  (solute )

1000 / 1000 = 1.0 kg

ppm = 20 / 1.0

= 20 ppm

Answer (1)

hope this helps!

Which event would be impossible to explain by using John Dalton’s model of the atom?

Answers

Answer:

It’s A

Explanation:
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