empirical formula
stokyometry
Lewis structure
chemical reactions
Balancing equations
100

What is the empirical formula

Empirical formulas show the simplest whole-number ratio of atoms in a compound

100

What is stoicomerty

the relationship between the relative quantities of substances taking part in a reaction or forming a compound, typically a ratio of whole integers

100

What are Lewis structures 

A Lewis Structure is a very simplified representation of the valence shell electrons in a molecule.  

100

What is a chemical reaction

A reaction that is cause between two elements 

100

What are balanced equations  

Equations with the same amount of reactants a products on both sides 

200

What are the steps to the empirical formula

  1. Step 1: Calculate the number of moles of each element presented in the question. ... 
  2. Step 2: Divide all results by the smallest number of moles found in Step 1.
  3. Step 3: Use the lowest whole-number ratio of the moles as subscripts
200

What is dimensional analysis

analysis using the fact that physical quantities added to or equated with each other must be expressed in terms of the same fundamental quantities (such as mass, length, or time) for inferencesto be made about the relations between them.


200

What are the dots surrounding the element 

The valance electrons

200

How do chemical reactions happen

Chemical reactions involve breaking chemical bonds between reactant molecules (particles) and forming new bonds between atoms in product particles (molecules). The number of atoms before and after the chemical change is the same but the number of molecules will change

200

What are reactents 

A chemical equation describes a chemical reaction. Reactants are starting materials and are written on the left-hand side of the equation

300

What is the empirical formula of H2O 

H2O this is becasue it is already in its simplest form 

300

What are the train tracks

The bars used to help sort things in stociometry  

300

What are valance electrons and how do they work

They are electrons on the outer most shell

300

What are the chemical reaction symbols


Yields

Indicates the results of the reaction

+

Reacts with or and

Does not imply math addition


Precipitate

Used to indicate a solid was formed

(6), (), (в)

or (ag)

Solid, liquid, gas or aqueous

The phase of matter the substance is in


Reacts with heat

Heat was needed for the reaction to happen


Gas is given off during reaction

The reaction gives off gas

300

What are products

Products are the end result of the reaction and are written on the right-hand side of the equation

400

True or false the molecular formula is the empirical formula 

False the molecular formula is not the empirical because often it is not in the simpalit form 

400

How do you do stociometry

  1. Balance the equation.
  2. Convert units of a given substance to moles.
  3. Using the mole ratio, calculate the moles of substance yielded by the reaction.
  4. Convert moles of wanted substance to desired units
400

What is the difference in bonds

Some bonds require more atoms to be formed in order to balance out the electrons

400

Reactions that changed Chemistry

1. Malliard reaction - it helped us understand how fire cooks things

2. Bronze - people used copper with tin to make bronze

3. Fermentation - helped understand how to grow crops and make wine

4. Saponification - helped us make soap to clean ourselves

5. Silicon - used to create things like technology  

400

What are the stepts to mole to mole coversions

Mole to Mole conversions

1. Find a balanced equation that describes the reaction

2. Identify the "given" information and what the problem is asking you to find

3. List other known quantities

4. Prepare a "train track" and plug in your conversion factors

5. Cancel units and calculate  


500

How does the empirical formula help with Chemestry 

It helps throught conversions of ions

500

How do we use stoicomerty in chemistry

We use it to help determine the amount of atoms moles or mass element has

500

How do we use Lewis structures

We use them to show how chemical formulas are made

500

Why do we use them

We use them so we can see what knds of elements react to what other kinds of elements 

500

Why do we use balancing equations

We use them to see how to control compounds and how to also make the compounds out of elements