9. Determine if each of the following sketches is showing a pure sample of an element or a pure sample of a compound. Substance 1 Substance 1 Substance 2 Substance 3 Substance 4 Substance 2 Substance 3 A) pure sample of an element B) pure sample of a compound Substance 4

Q: Is carbon dioxide gas a pure substance? Explain.

A: Yes, the Carbon dioxide(CO2) is a pure substance.

Q: 5)An element cannot A) be part of a heterogeneous mixture B) be part of a homogeneous mixture C) be…

A: Given An element cannot _____________

Q: You were asked to separate sand and sodium chloride in water. choose three methods to separate the…

A: Physical separation (picking out pieces or utilizing density to shake sand to the top), dissolving…

Q: II. Tell whether if the following is an example of solid, liquid or gas. Write S for solid, L for…

A: Since you have posted multiple questions, we will solve only first question for you. If you want any…

Q: Refer to the Chemical Compounds table above. How many total elements are in Ethanol?

A: • Ethanol is an organic chemical compound.    • The functional group in ethanol is -OH (i.e.…

Q: Classify these substances. More than one answer may apply in each case. N2 solution O homogeneous…

A: Element - It is a pure substance made up of only a single atom.  Compound - It is a pure substance…

Q: Making observations on a substance without changing the chemical makeup of that substance is known…

A:

Q: Which of the following is classified correctly? 24 Karat gold is a homogeneous mixture. Graphite is…

A: 24 karat gold is means pure gold no any other metal are mixed with gold that means 24 karat gold is…

Q: classify whether a substance is pure or mixture, element or compound homogenous or heterogeneous

A: 1. Moth balls - Mixture, Compound, heterogeneous mixture 2 Fire- It is a mixture of hot gas,…

Q: Explain this statement in your own words and give an example. The properties of the substances…

A: Every compound is made up of atoms and molecules. The atoms combine in a fixed ratio to give the…

Q: classify to be solid, liquid or gas     Particles are close together but are not held rigidly…

A: To identify whether the given statement represents solid, liquid or gas.

Q: 2. What is matter composed of?

A: To find: What is matter composed of

Q: If it can be chemically decomposed, what type of matter is that substance? D. Heterogeneous A.…

A:

Q: Use the information and models to answer the following questiön. A group of students are trying to…

A: Electrical conductive material are those which can transfer charge from one end to other end.

Q: 19. Which of the following substances would be classified as a mixture? a. Water b. Table Salt С.…

A: Applying definition of mixture.

Q: Is a change in phase a physical change or a chemical change? Explain.

A: A physical change is a reversible change whereas chemical changes are generally irreversible. No new…

Q: 2. { a) Sodium and chlorine are elements. c) Sodium chloride is a pure substance. Which one of the…

A: 1st statement  Sodium and chlorine are elements is a correct statement.   2nd statement Sodium…

Q: Enter a tick mark (/) in the appropriate column to indicate whether the following are properties of…

A:

Q: Which of the following statements describe a physical property? i. A property which can be observed…

A: A physical property is a characteristic of a substance that can be observed or measured without…

Q: 66. Using the picture below, describe the test sample placed in the watch glass. White crystalline…

A: The nature of above compound is decided on the basis of its physical appearance.

Q: 1. Substances that can be broken down into simpler compounds or elements by a chemical change 2.…

A: A compound is a material composed of two or more components. For example Water, carbon dioxide etc.…

Q: 12. What is an element? A compound?

A: An element and a compound has to be defined.

Q: A What I have learned? Answer the following questions. 1. Can a physical change occur even if there…

A: Since you have posted a question with multiple sub-parts, we will do the first three sub-parts for…

Q: List three examples of substances. Explain why each is a substance.

A: List three examples of substances. Explain why each is a substance.

Q: Distinguish between each of the following and give example of each case A. Pure substance and…

A: Pure substance are in a category of one kind of particles and it has a fixed structure and of same…

Q: What type of pure substance can be decomposed chemically into other pure substances? O compound O…

A: Pure substances are defined as substances that include only one type of particle and have an uniform…

Q: How is an element different than a compound?

A: Definition- An element is a pure chemical substance made of same type of atom.   A compound contains…

Q: Match the description below with the following microscopic pictures. More than one picture may fit…

A: Answer:When two or more than two gases are present in a system then it is called as mixture of…

Q: the atoms of elements or molecules of compounds when a chemical change occurs and when a physical…

A: Chemical reaction and chemical change: A chemical reaction bonds between atoms are broken and new…

Q: Part B A silver necklace is made from a pure sample of silver that is free of impurities. Which term…

A:

Q: Brass is a combination of copper and zinc metals. How would you classify brass? Element O…

A: Alloys are the compounds which are made up of two or more metals. The property of a metal can be…

Q: Is pure 24-carat gold a substance, element, and/or compound? Explain.

A: 24-carat gold an element. It can be also reffered to as pure substance. It contains only the gold…

Q: Which of the following is an example of a chemical change? X Selected Answer: Answers: alcohol…

A: Physical changes: These are the changes that does not affect the chemical composition.These are…

Q: Identify as an element, compound or mixture of compounds

A: Element: Element is a chemical substance which has a single atom and it cannot be broken down in…

Q: True or False? * Qualitative and quantitative data gathered via laboratory experiments is one of…

A: Qualitative data is not numerical, it is descriptive. Quantitative data gives a numerical value,…

Q: Is air a solution or a heterogeneous mixture? What technique can be used to separate air into its…

A: Air is mixture of many gases like Nitrogen, Oxygen, Carbon-dioxide etc. These gases makes up the…

Q: Which of the following can be more completely broken down? a) Petrochemicals b) Metals c)…

A: Among the given options, Petrochemical = does not break completely. Metals = does not break.…

Q: Suppose you are measuring the mass of a solid sample on a balance using a weigh boat. You record the…

A: An instrument used to determine the weight of samples used in analysis is called a weigh balance.…

Q: 2. Structure E is a form of carbon. What is the name of this structure? A. carbide B. graphite Put a…

A: An element is a pure substance made up of only one kind of atom. The elements can be categorised…

Q: 19. List four properties you could use to distinguish between iron and aluminum. State which of them…

A: Since you have asked multiple question, as per our company guidelines we are supposed to answer the…

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.