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
