Module 1 - Chemistry

What is the correct answer to the following problem (with the correct number of significant figures)? (3.2 ÷ 0.123) + 45.7 = ?

72

Which of the following are common types of minerals in rock and soil?

Aluminates, oxides & silicates

What is the definition of a molecule?

An independent structure consisting of two or more atoms chemically bonded together.

A recent set of advertisements has a picture of a an aluminum can with an aluminum-frame bicycle, along with a hypothetical quote from the can that reads: "I want to be a bike. Recycle me." The analysis of the life cycle of an item starting with its raw materials and ending with the used item becoming the raw material for new products is called

Cradle-to-cradle

Write 1,350. m in scientific notation

1.350 x 10(3)

Which of the following reflects the correct procedure to calculate the molar mass of CH(2)CI(2)?

12.0 + 2(1.0) + 2(35.5) = 85.0 g/mol

The molar mass of CH(2)CI(2) is 85.0 g/mol, while the molar mass of carbon in this compound is correctly expressed as _____.

12.0g C/85.0 g CH(2)CI(2) x 100%

The majority of new smartphones being released have displays that are at least 5 inches in size. What is this size in centimeters? (There are 2.54 cm in one inch.)

12.7 cm

Atomic Number

12/6 C 6

Atomic Symbol

12/6 C C

Mass Number

12/6 C 12

How many protons and neutrons, respectively, are in an atom of chlorine (mass number 35)?

17, 18

How many significant figures should the answer to the following calculation contain? 2.3 x 5.46 = _____

2

2.3 x 106 meters is the same as ____________ meters.

2,300,000

One of the lightest smartphones on the market today weighs 113 g. To protect your phone, you may want to use a screen protector, which weighs 27.2 g, and a heavy duty phone case, which weighs 114 g. What is the total weight of the phone, screen protector, and case?

254 g

The quantity 0.0000064 g expressed in scientific notation.

6.4 x 10(-6) g

Electron: Relative Weight

~0 amu

Pure Substances

Each composed of a single substance

What term is defined as the flow of electrons from one location to another?

Electricity

Cesium

Element with 55 protons Chemical symbol: Cs

What are the three pillars of sustainability?

Environmental, social, economic

Neutron: Location in Atom

In the Nucleus

Proton: Location in Atom

In the Nucleus

Green Shading on the Periodic Table

Indicates the metals, which represent most of the periodic table.

A molecule composed of a metal atom and a nonmetal atom

Ionic

The accuracy of a calculation is limited by the quantity that has the _____ number of significant figures.

Least

The nucleus of an atom contains

Protons and neutrons only.

Atoms

What elements are made up of and are the smallest building block that can exist as a stable, independent entity.

On the periodic table: To the right and is blue

non-metals

Chemical Symbols

one or two letter abbreviations for the elements.

Row 17 on the periodic table

Halogens

Tea would be an example of a _____ mixture

Homogeneous

Which of the following is a diatomic molecule: hydrogen (H2), aluminum (Al), sulfur (S8), or carbon (C)?

Hydrogen

For the ionic compound NaCl, what is the charge on the sodium ion?

+1

Proton: Charge

+1

If a mixture of quartz and bauxite contains 78% quartz, this means that _____.

- 150 g of this mixture contains 117 g of quartz - There are 78 g of quartz for every 22 g of bauxite - There are 78 g of quartz in 100 g of the mixture

Electron: Charge

-1

Neutron: Charge

0

Neutron: Relative Weight

1 amu

Proton: Relative Weight

1 amu

Allotropes of oxygen

C(2) & C(3)

Element

Composed of many atoms of the same type.

H2O

Compound consisting of oxygen and hydrogen atoms.

Most elements occur in nature as _____.

Compounds

Matter

Everything around you - the air you breathe, the water you drink, and the mobile device in your hand is defined as

Which of the following elements commonly occur as diatomic molecules?

Fluorine, oxygen, hydrogen & nitrogen

On a Periodic Table, the columns of elements with similar properties are

Group

Anything that occupies space and has mass

Matter

On the periodic table: Green, majority of elements and is towards the left.

Metals

Solid compounds of metals found in rocks and soil are called _____.

Minerals

Classify the following compound as either molecular or iconic: XeF(4)

Molecular

The most common elemental form of nitrogen is _____.

N(2)

The atomic number of fluorine

Nine

Row 18 on the periodic table

Noble gases

Heterogeneous Mixture

Not uniform in composition throughout. The relative amounts of sand, dirt, rocks, etc. will vary from one handful to the next.

Diatomic Molecules

Only two atoms together

Electron: Location in Atom

Outside of Nucleus

Many metals occur as minerals in rocks and soil. A mineral in which is bonded to oxygen is called a(n) _____, whereas a mineral containing oxygen and silicon together is called a(n) _____.

Oxide, silicate

Examples of molecular (covalent) compounds?

SO(2), CCl(4) & N(2)O

Standard Notation: 0.05

Scientific Notation: 5 x 10(-2)

Standard Notation: .00005

Scientific Notation: 5 x 10(-5)

Standard Notation: 500

Scientific Notation: 5 x 10(2)

Standard Notation: 50,000

Scientific Notation: 5 x 10(4)

Standard Notation: 5,000,000

Scientific Notation: 5 x 10(6)

A _____ figure is a digit that represents the accuracy with which an experimental quantity is known.

Significant Figure

Example of pure substance

Silver ware

One of the three pillars of sustainability, resulting in a better quality of life for all

Social

Not a mixture

Sodium Chloride

Groups

The elements in the periodic table which fall into vertical columns