Answer:
              Height  =  1.9493 cm
              Width  =  1.9493 cm
              Depth  =  1.9493 cm
Solution:
Data Given:
                   Mass  =  20 g
                   Density  =  2.7 g/mL
Step 1: Calculate the Volume,
As,
                                         Density  =  Mass ÷ Volume
Or,
                                         Volume  =  Mass ÷ Density
Putting values,
                                         Volume  =  20 g ÷ 2.7 g/mL
                                         Volume  =  7.407 mL or 7.407 cm³
Step 2: Calculate Dimensions of the Cube:
As we know,
                                         Volume  =  length × width × depth
So, we will take the cube root of 7.407 cm³ which is 1.9493 cm.
Hence,
                                         Volume  =  1.9493 cm × 1.9493 cm × 1.9493 cm
                                         Volume  =  7.407 cm³
 
        
             
        
        
        
Answer: The possible molecular formula will be 
Explanation:
Mass of C= 27.3 g
Mass of O = 72.7 g
Step 1 : convert given masses into moles.
Moles of C = 
Moles of O = 
Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.
For C =  
For O = 
The ratio of C : O = 1: 2
Hence the empirical formula is  
The possible molecular formula will be=
 
        
             
        
        
        
What is it you need help on? there is nothing here????
ANSWER:
        
                    
             
        
        
        
Cause latin name of Pb is plumbum.
The same K - potassium - latin name is kalium.
        
             
        
        
        
Melting is an example of phase change