Which of the following statements is true?A mixture has two types of particle chemically bonded together.A pure substance is made of two or more substances that are not chemically joined.You can change the proportion of substances in a mixture.

Which of the following is TRUE about a mixture?a.It is a classification under compounds.b.It is one of the two types of pure substance.c.Its components cannot be separated physically.d.It retains the property of the components after mixing.

Determine whether the following statement is true or false:A mixture is a combination of two or more substances in which no new substances are formed.

Which of the following statements is not correct?A mixture consists of two or more elements or compounds not chemically combined togetherA compound contains two or more elements chemically combined in fixed proportionsAn element is a substance that is made from only one type of atomA pure substance is made up of a single element or compound mixed with water2Which of the following is not a pure substance?AirEthanolSodium chlorideWater3Which of the following describes a pure substance?Melts at specific and fixed temperature, boils over a range of temperaturesMelts and boils over a range of temperaturesBoils at specific and fixed temperature, melts over a range of temperaturesMelts and boils at specific and fixed temperatures

List two examples of mixtures that involve the combination of substances in different states (solid, liquid or gas). For each example, identify the components and their states.

Which of the following is TRUE about a pure substance?a.It is always a solid or gas.b.It can be an element.c.It does not have a fixed boiling point.d.It is also called "homogeneous mixture".