1. Identify the following as examples of chemical or physical changes. glass melting a. b. milk being made into cheese a dentist drilling a tooth C. d. ironing a shirt a newspaper yellowing in the sun e.

Q: . A chemist mixes sodium with water and witnesses a violentreaction between the two substances. This…

A: The given statement is   A chemist mixes sodium with water and witnesses a violent reaction between…

Q: Does each of the following describes a physical change or a chemical change? a. The helium gas…

A: Physical change- Changes in which no change occurs in chemical composition of a substance. Chemical…

Q: . When table salt is placed in water and stirred it dissolves and a clear liquid is obtained. This…

A: On the basis of changes; all processes can be classified as physical change and chemical change. The…

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: Choose Physical or Chemical Change to describe the changed described.   When a teaspoon of baking…

A: Answer :- a) Chemical  When a teaspoon of baking soda (sodium bicarbonate) is placed into a few…

Q: During a physical change:    A. It undergoes physical state changes  B. There are no changes   C.…

A: Properties of physical change : when a substance undergoes physical change, its composition remains…

Q: Which of the following terms describes what a doctor forms when treating patients prior to ordering…

A: Experiment is the term required for the treatment of the patient by the doctor with the normal…

Q: Is the following transformation representative of a physical change or a chemical change? see photo…

A: Physical change: The change of state of matter is known as a physical change. In this change…

Q: 1. Which is an example of a physical change? A) The rusting of an iron nail B) The burning of…

A: melting of an ice cube in a glass of soda is a physical change. So option e is correct answer. Here…

Q: Which of the following is a physical change?   a. Ice melting into liquid water   b. Sodium…

A: Physical changes are changes affecting the form of a chemical substance, but not its chemical…

Q: 10. The following is a homogeneous mixture A. 70% isopropyl alcohol B. 100% isopropyl alcohol CES…

A:

Q: 1) Which of the following is chemical property? A. Objects made of silver become tarnished. 3+ B.…

A: Chemical property of a substance is the property that observed after or during the chemical…

Q: Classify the following as either pure substances or mixtures. If it is a pure substance, state…

A: In the above problem we have to determine a substance is pure or mixture.homogeneous mixture or…

Q: Which of the following statements is FALSE? a. A mixture may be either homogeneous or…

A: The states of matter are solid, liquid and gases. Matters are further classified as mixtures and…

Q: 2. In boiling water, the bubbles contain: a. a mix of hydrogen gas and oxygen gas in a 2:1 ratio b.…

A: To answer this question , we would use the fact that boiling of water is a physical change.

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.