This problem is providing information about the mass of a tennis ball, 56.6 g (0.0566 kg) and asks for the velocity it will have to equal the wavelength of green light, which is 5400 A or 540 nm (5.4x10⁻⁷ m). Thus, after doing the math, the result is 2.17x10⁻²⁶ m/s.
<h3>
Broglie's wavelength:</h3>
In this case, we recall the formula of the Broglie's wavelength as shown below:

Whereas lambda is the wavelength, h is the Planck's constant, m the mass and v the speed; thus, we solve for the speed according to the question:

<h3>Calculations:</h3>
Then, we just plug in the numbers we were given to get the answer:

Learn more about Broglie's wavelength: brainly.com/question/5440536
 
        
             
        
        
        
Answer:            <span>
A hexagon with nothing drawn inside it does not represent Benzene.
Explanation:Below attached picture contains structures mentioned in given option.
Structure of 
Option-A is shown in 
Red Color.
</span>
Structure of 
Option-B is shown in 
Blue Color.
Structure of 
Option-C is shown in 
Green Color.
Structure of 
Option-D is shown in 
Orange Color.
Result:          Except Option-A, all structures represent Benzene. Option-A in fact shows the structure of Cyclohexane.
 
        
                    
             
        
        
        
Answer:
- 1 mole of carbon disulfide gas at 273 K and 40 L
- 1 mol of chlorine gas at 273 K and 40 L
-  1 mol of neon gas at 273 K and 40 L
- 1 mol of neon gas at 273 K and 20 L
-  1/2 mol of neon gas at 273 K and 20 L
- 1/2 mol of neon gas at 100 K and 20 L
-  1/2 mol of liquid neon at 100 K
Explanation:
Entropy is the measure of disorder or randomness in a closed system. Its an extensive property of a thermodynamic system
The following points must be considered when ranking the systems according to their entropy:
- The entropy of gases are highest than liquids or solid. And entropy of liquid is higher than solid. That is because gas has more microstate thus have the highest entropy.
- Entropies of large complicated molecules are greater than those of smaller, simpler molecules. Because larger molecules have more disorder because of the greater number of ways they can be move around in three dimensional space.
- highest temperature and highest volume will lead to greatest entropy
- 1 mole of any substance will have greater entropy than 1/2 mole of that same substance