Kinetic energy=Ek
Ek=(1/2)mv²
Ek=480 J
v=8 m/s
mass=?
Ek=(1/2)mv²
480 J=(1/2)m(8 m/s)²
480 J=(32 m²/s²) m
m=(480 J)/(32 m²/s²)=15 kg
answer: the mass of the object is 15 kilograms. 
        
             
        
        
        
Answer:
carbon
Explanation:
tbh im not sure just guessing
 
        
             
        
        
        
Good idea!maybe I should try that
        
             
        
        
        
No, there’s not any pressure
        
             
        
        
        
Answer:
<h2>The answer is 35 mL</h2>
Explanation:
Density of a substance can be found by using the formula

From the question we are finding the amount of space the gas will occupy that's the volume of the gas
Making volume the subject we have

From the question
mass = 23.8 g/mL
Density = 0.68 g/mL
Substitute the values into the above formula and solve
That's

We have the final answer as
<h3>35 mL</h3>
Hope this helps you