Introductory Chemistry Quiz
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Chemistry is the science that deals with the composition and properties of matter. Matter is anything that occupies space and has mass. Matter includes things we can see and touch (such as water, earth, and trees), as well as things we cannot (such as air). Composition refers to the parts or components of a sample of matter and their relative proportions. Pure water is made up of two simpler substances – hydrogen and oxygen – present in a certain fixed proportion. A chemist would say that the composition of water is 11.19% hydrogen and 88.81% oxygen by mass. Hydrogen peroxide, a substance used in bleaches and antiseptics, is also made up of hydrogen and oxygen, but it has a different composition. Hydrogen peroxide is 5.93% hydrogen and 94.07% oxygen by mass. Properties are those qualities or attributes that we can use to distinguish one sample of matter from others. Physical Properties and Physical Changes A physical property is one that.

is observable or measurable without changing the substance itself

Matter is anything that ______ space and has mass

occupies

Pure water is made up of two simpler substances – hydrogen and oxygen – present in a certain fixed ______

proportion

A chemist would say that the ______ of water is 11.19% hydrogen and 88.81% oxygen by mass

<p>composition</p> Signup and view all the answers

Properties are those qualities or attributes that we can use to distinguish one sample of ______ from others

<p>matter</p> Signup and view all the answers

What does composition refer to in the context of matter?

<p>The parts or components of a sample of matter and their relative proportions</p> Signup and view all the answers

How does the composition of hydrogen peroxide differ from that of water?

<p>Hydrogen peroxide has 5.93% hydrogen and 94.07% oxygen by mass</p> Signup and view all the answers

What are properties of matter?

<p>Qualities or attributes that distinguish one sample of matter from others</p> Signup and view all the answers

What is a physical property of matter?

<p>A quality that can be observed or measured without changing the composition of the substance</p> Signup and view all the answers

What is matter according to the given text?

<p>Anything that occupies space and has mass</p> Signup and view all the answers

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