If you're looking for "what rocks are formed by changes..." it's Igneous Rocks.
        
                    
             
        
        
        
Answer:
14.945798 in us fluid ounce
Explanation:
 
        
             
        
        
        
Frequency is defined as the number of waves per second. In this machine 25 waves pass in one second. 
We need to calculate the number of waves that pass a particular point during one second. 
During 2 seconds -25 waves 
Therefore in one second - 25/2 = 12.5 waves/s.
1 wave per second has the unit Hertz (Hz) 
Therefore answer is 12.5 Hz
        
             
        
        
        
Answer:
- 6.38x10²² molecules C₆H₁₂O₆
Explanation:
First we <u>convert the given masses into moles</u>, using the <em>compounds' respective molar mass</em>:
- 64.7 g N₂ ÷ 28 g/mol = 2.31 mol N₂
- 83 g CCl₄ ÷ 153.82 g/mol = 0.540 mol CCl₄
- 19 g C₆H₁₂O₆ ÷ 180 g/mol = 0.106 mol C₆H₁₂O₆
Then we multiply each amount by <em>Avogadro's number</em>, to <u>calculate the number of molecules</u>:
- 2.31 mol N₂ * 6.023x10²³ molecules/mol = 1.39x10²⁴ molecules
- 0.540 mol CCl₄ * 6.023x10²³ molecules/mol = 3.25x10²³ molecules
- 0.106 mol C₆H₁₂O₆ * 6.023x10²³ molecules/mol = 6.38x10²² molecules