2. Classify each of the following changes as primarily chemical or physical in nature: a. protein being digested by stomach enzymes c. ice melting e. blowing up a balloon b. wax melting d. wood burning f. paper burning

Q: Which of the following is not a chemical change? A. burning coal B. making bread rise using baking…

A: A chemical change is a change in which the initial compound is having different structure or formula…

Q: What is a mixture? A. A solid gold ring B. Nitrogen and oxygen in a molecule C. Copper and lead…

A: A mixture is an homogeneous or heterogeneous solution in which different substances are present in…

Q: Which is NOT directly attributable of property of water? A. The top of a lake freezing B. The…

A: Some important Characteristics of water  (1). polarity, (2). cohesion, (3). adhesion, (4).…

Q: = a homogenous mixture s be made of liquid com

A: (7) What is a pure substance that is only made of the type of atom –  (A) Element → Element is a…

Q: 1. Classify each of the following as a chemical or physical change. a. burning of wood b. browning…

A: Changes are classified into two types -  A - Physical Changes B - Chemical Changes

Q: 2. For each of the following sketch the universe, define a system and its surroundings and give the…

A: The given questions relate to the practical work in the laboratory.Note - As per guidelines we have…

Q: 14. A researcher finds that a solid has high melting and boiling points, and is soluble in water.…

A: Ionic compound is a chemical compound composed of ions held together by electrostatic forces termed…

Q: State whether the following properties of matter are physical or chemical. a. An iron nail is…

A: The change of one type of matter into another type (or the inability to change) is a chemical…

Q: Which substance can be separated by filtration?  A. Compound B. Element C. Mixture D. Solution

A: Matter exhibits two types of property:  Physical and chemical

Q: What is an element? A. A substance that can be separated by physical means B. A substance that…

A: An element is a pure substance consisting only of atoms that all have the same numbers of protons in…

Q: Classify each process as a chemical or physical change. a. the condensation of water on the outside…

A: In a process, when there is no change in the chemical identity of the substance, then such a process…

Q: Classify the following as to chemical or physical change: Assignment : Copy and write your answer…

A: Physical changes only change the appearance of a substance while in chemical changes the the…

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: Which one of the processes listed below describes (rather than physical) change? a. Fat is…

A: Physical change is the change that causes a change in the texture, shape, volume of any compounds.…

Q: Energy Use the terms in the word bank to complete the graphic organizer below. Word Bank potential…

A: Energy is defined as the capacity of doing work.

Q: Classify each process as a chemical or physical change. a. dissolving calcium chloride in water b.…

A: The given processes as a chemical or physical change has to be given.

Q: Classify each as a physical change or a chemical change.a. breaking a pencil in twob. water freezing…

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

Q: Classify the following as to chemical or physical change: Assignment : Copy and write your answer…

A: Physical change: In a physical change the physical state of matter changes. In this change different…

Q: 1. When steam condenses, A. A physical change occurs. B. A chemical change occurs. C. Both physical…

A: When steam condenses a physical change occurs.

Q: To the best of your knowledge, classify each of the following as an element, A compound, or a…

A:

Q: Which of the following is a heterogenous mixture?   A. raisin bran   B. milk   C.…

A: A heterogeneous mixture is a mixture in which the compound of the mixture is not uniformly mixed.

Q: 1. What pieces of apparatus or equipment are used for measuring: a. Temperature? b. Small amount of…

A: (1) (a) Temperature is measurement of coldness and hotness of a Substance. Usually heat always flow…

Q: Which of the following vocabulary words defines the energy due to motion?  A.Heat B.Potential…

A:

Q: 14. Your mom is washing the rice in the casserole pot before cooking it A. filtration B. decantation…

A: Given: 14. Rice is being washed before cooking: 15. Dr Merle is getting some cash from his wallet.…

Q: 1. Metal Ore a. element b.compound c. mixture   2.  Grinding dried leaves into a fine powder…

A: We have to classify metal ore and type of change occuring on grinding leaves.

Q: Intensive property is a property that does not depend on the amount of a substance. Which of the…

A: An intensive property is a property which do not depend on the amount of substance.  Am extensive…

Q: Which of the following is not a hazard category? Single choice.     a. Industrial b. Mechanical c.…

A: The hazardous categories are those which cause damage.

Q: Copper pennies Pour about 2 Tbs of vinegar into the bowl and add a 4 tsp of salt stir it up. Put…

A:

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.