What is an element? A. A substance that can be separated by physical means B. A substance that cannot be broken into simpler substances C. A substance that is made using a chemical reaction D. A substance that is made from two different metals

Q: in the posted lecture notes! (1 element in 2 typeś of c.p's) Mark x for all that may apply: Pure?…

A: Pure substance: A pure substance is a sample of matter with both definite and constant composition…

Q: Is oxygen a homogeneous or heterogeneous mixture?

A: homogeneous mixture: it contains only one elemental form of pure substance. heterogeneous mixture:…

Q: Phases of matter for He 1. In this box using a circle to represent each He atom, draw what you think…

A: The solution is given below -

Q: I need help from questions A-C

A: DECOMPOSITION REACTION: A reaction in which a compound is cleaved into two or more smaller…

Q: Define substance and give two examples of things that are substances.

A: The matters are defined as a substance, mixture, element, or compound. Each category of matter…

Q: Both a mixture and a compound are combinations of substance. So explain how they are different

A: Compounds  - These are the substances that  are made up of more than one type of atoms. Mixture…

Q: Classify substance as a pure substance or a mixture. If it is a pure substance, classify it as an…

A: In human, the temperature of the body is maintained by the secretion of eccrine glands. Sweat on the…

Q: Classify the words below by placing them under their right types of energy. (It is possible that one…

A: Some forms of energies are not given above so are mentioned below in a tabular form.

Q: 16. The mass of an object can vary with the object's location. 17. A mass measurement includes the…

A: Since your question has multiple sub-parts, we will answer the first three sub-parts for you. If you…

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: Describe how a homogeneous mixture differs from a heterogeneous mixture.

A: The homogenous mixture is a mixture which has only one phase(means of homo) is present or there can…

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: why are most things we eat a mixture and not pure substances?

A: Given: Most things we eat is a mixture and not a pure substance To find: Reason for it Solution:…

Q: What is the difference between and element and a compound?

A: element is a a pure substance which cannot be decomposed in to a simple substance compounsd is…

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: Classify substance as a pure substance or a mixture. If it is a pure substance, classify it as an…

A: Given: Aluminum

Q: Describe the Atomic Theory of Matter?

A: The atomic theory of Matter has to be described.

Q: If there is no physical change in the different materials that are combined together, __________ is…

A: Given statement is :  If there is no physical change in the different material that are combined…

Q: 25. Two types of matter are mixtures and pure substances. The two types of pure substances are

A:

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: Supposed to magnesium feelings and sulfur or heat it so they react with each other forming magnesium…

A: Concept: The pure substances have constant composition throughout the given substance. The mixed…

Q: Why a piece of wood is a mixture?

A: Wood is a substance made up of cellulose, hemicelluloses, and lignin.

Q: What is an element? A. Oxygen and nitrogen joined together. B. A piece of pure nickel C. A water…

A: The question is based on the concepts of general chemistry. it talks about elements which is purest…

Q: ne of the best learning in school is learning HISTORY, i.e. the history of Chemistry, we know that…

A: The history of chemistry starts from the ancient time span to the current era. Examples:  1.…

Q: Classify substance as a pure substance or a mixture. If it is a pure substance, classify it as an…

A: Given: Vegetable soup

Q: d. What is the boiling point of potassium in °F? e. What is the boiling point of potassium in…

A: Boiling point is the temperature at which a liquid changes to vapour phase.

Q: What are the three fundamental laws of chemistry?

A: The laws of chemical combinations are the fundamental laws of chemistry.

Q: Choose the INCORRECT statement. Select one: a. An element is a substance made of one type of atom.…

A: Option a is correct because a element is a substance made of one type of atom.  Ex: Carbon is a…

Q: Explain the difference between an element and a compound?

A: Elements refer to pure substances that are composed of only 1 type of atom. Compounds refer to…

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

A: Water molecule, H2O is composed of two hydrogen and one oxygen atom. The specific geometrical…

Q: Classify substance as a pure substance or a mixture. If it is a pure substance, classify it as an…

A: According to the given data, A substance made up of the same atoms is known as an element. A…

Q: Do you think you could light a log with a single matchstick? How about twigs or smaller pieces of…

A: The minimum temperature at which any substance starts to burn or catches fire is known as ignition…

Q: A scientist has two containers. Inside each container is a blue liquid. The liquids are substances.…

A:

Q: Explain the main goal of chemistry

A: Chemistry is the science that investigates the properties of matter by examining the atoms and…

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

A: Any change in the composition of a substance results in differences in the properties of the…

Q: Read This! Matter is classified as a pure substance when all of the particles are the identical.…

A: Given : Some models of Compounds are given To find : 5. Pure substances and Mixtures 6. Elements and…

Q: What do metals and nonmetals have in common? A both have high melting and boiling points B both are…

A: Metals are those elements which donate electrons. Non metals are those elements which accept…

Q: Classify each statement as an observation, a law, or a theory. All matter is made of tiny,…

A: The given statement is "All matter is made of tiny, indestructible particles called atoms." It can…

Q: Mass of one a mu) Carbon Type 1                                12.0 Carbon Type 2…

A: The sum of all the values of individual masses divided by the total number of items in the sample is…

Q: What observations did Antoine Lavoisier make? What law did he formulate?

A: Antoine Lavoisier make an observation that in a chemical reaction matter is neither created    nor…

Q: Classify substance as a pure substance or a mixture. If it is a pure substance, classify it as an…

A: Anything that occupies space and has mass is termed as matter.

Q: Difference between homogeneous and heterogeneous mixture

A: Heterogeneous mixture: A mixture in which components combine to give a non-uniform composition is…

Q: Which statement is NOT true about compounds? O Made of only one kind of atom O Water is a common…

A: Compounds are formed when two or more different types of elements are chemically comnoned.

Q: Nitrogen makes up what fraction of the mass of the hum Body? Nitrogen makes up what percentage of…

A: 1.Fraction of Nitrogen in mass of human body  70 kg  of Nitrogen is 1 fraction   2.2 Kg   of…

Q: A 7.57 g sample of calcium carbonate completely decomposes into calcium oxide (lime) and carbon…

A: A chemical reaction is a symbolic representation of the conversion of substances to new substances.…

Q: List two differences between a compound and a mixture

A: Two differences between a compound and a mixture :…

Q: Mixtures can be classified as either homogeneous or heterogeneous. Compounds cannot be classified in…

A: In this question we need to define the terms compound , mixture , homogeneous and heterogeneous . We…

Q: Briefly discuss the difference between a homogenous mixture and a heterogeneous mixture.

A: When different substances mix to form a uniform mixture in same phase , then it is called…

Q: During a filtration or distillation experiment, we separate a mixture into its individual…

A: A mixture is a combination of two or more pure substances that retain their chemical identities.  It…

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.