All isomers of octane have the same(1) molecular formula (3) physical properties
(2) structural formula (4) IUPAC name
Answers
Answer: Option (1) is the correct answer.
Explanation:
When two different molecules represent same molecular formula but different arrangement of atoms then they are known as isomers.
Whereas physical properties are the properties which determines the state of object or substance. That is, property which can be observed.
For example, wood is brown in color.
On the other hand, when arrangement of atoms are represented by the formula of a molecule then it is known as structural formula.
Thus, we can conclude that all isomers of octane have the same molecular formula.
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4Fe + 3O2à 2Fe2O3 is a balanced equation. What is the charge on each iron (Fe) ion in hematite (Fe2O3)?A. +1B. +2C. +3D. +4
Answers
Answer:
Second graph is more reactive.
Explanation:
I just did the lesson myself, chose the first graph, and obviously got it wrong.
Therefore I can tell you with 100% certainty that the correct answer is graph #2 in this case. Hope this helps.
Answers
Answers
= 27 cm ³
Mass = 213 g
Density =
=
= 7.89 g / cm³
Thus answer is D.
Answers
Answer
1.60217662 × 10-19 coulombs
Explanation:
.
Answers
The substance that cannot be broken down by chemical change is .
Further Explanation:
Substance is the pure form of matter while a combination of atoms or molecules is termed as mixture.
Types of substances:
1. Element
The simplest form of substance that cannot be further decomposed by any chemical means is called an element. Carbon, sulfur, and cobalt are some of the examples of elements.
2. Compound
When two or more different elements are held together by chemical methods, compounds are formed. These can further be decomposed into their corresponding constituents. The properties of compounds are very different from those of their constituent elements. NaCl, and
are examples of compounds.
(1) Ammonia is composed of one nitrogen and three hydrogen atoms so it is a compound. Therefore it can be broken down by chemical change.
(2) Mercury is an element so it is the simplest form in which it can exist. Therefore it cannot be broken down by chemical change.
(3) Propane is composed of three carbon and eight hydrogen atoms so it a compound. Therefore it can be broken down by chemical change.
(4) Water is composed of one oxygen and two hydrogen atoms so it is a compound. Therefore it can be broken down by chemical change.
Learn more:
- Which sample is a pure substance? brainly.com/question/2227438
- Which must be a mixture of substances? brainly.com/question/637791
Answer details:
Grade: High School
Subject: Chemistry
Chapter: Elements, compounds, and mixtures
Keywords: substance, mercury, propane, water, ammonia, element, compound, chemical change, decomposed, simplest form, NaCl, CH4, carbon, sulfur, cobalt.
The substance which cannot be broken down by a chemical change is mercury as it is an element, hence option 2 is correct.
It is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.
Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.
The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.
Thus, option 2 which is mercury is correct as it is an element.
Learn more about element,here:
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