Unit 4 Chemical Reactions
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| What is the large number in the front of the chemical formula that identifies the number of molecules? | coefficient
🗑
|
||||
| What is the small number that shows the ratio of atoms? | subscript
🗑
|
||||
| Give an example of a physical change. | melting, freezing, evaporation
🗑
|
||||
| Is photosynthesis a physical or chemical change. | chemical
🗑
|
||||
| Is H2O an element or a compound? | compound
🗑
|
||||
| Is NaCl an element or a compound? | compound
🗑
|
||||
| What is the law that states matter is not created nor destroyed? | Law of Conservation of Mass
🗑
|
||||
| The chemical formula for glucose is C6H12O6. How many elements are in this formula? | 3
🗑
|
||||
| How do you identify the number of elements in a chemical formula? | count the different symbols
🗑
|
||||
| What are the substances on the left of a chemical equation? | reactants
🗑
|
||||
| What are the substances on the right of the chemical equation? | products
🗑
|
||||
| In the formula 2H2O, how many hydrogen atoms are present? | 4
🗑
|
||||
| How do you calculate the number of atoms for an element in a compound? | multiply coefficient x subscript
🗑
|
||||
| What does the arrow in the chemical equation mean? | yields
🗑
|
||||
| Balance the equation C + H2 -> CH4? | C + 2H2 -> CH4?
🗑
|
||||
| What is the minimum amount of energy needed to start a reaction? | activation energy
🗑
|
||||
| How many carbon atoms are in 4CO2? | 4
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
lschramme
Popular Chemistry sets