<u>Answer:</u> The temperature to which the gas in the syringe must be heated is 720.5 K
<u>Explanation:</u>
To calculate the volume when temperature and pressure has changed, we use the equation given by combined gas law.
The equation follows:

where,
 are the initial pressure, volume and temperature of the gas
 are the initial pressure, volume and temperature of the gas
 are the final pressure, volume and temperature of the gas
 are the final pressure, volume and temperature of the gas
We are given:

Putting values in above equation, we get:

Hence, the temperature to which the gas in the syringe must be heated is 720.5 K
 
        
             
        
        
        
Answer:
7. .........................
 
        
             
        
        
        
The average acceleration is -5.0 m·s⁻².
The formula for acceleration (<em>a</em>) is
 
 = 25 m·s⁻¹;
 = 25 m·s⁻¹;   = 0;
 = 0;  = 5.0 s
 = 5.0 s
∴  = -5.0 m·s⁻²
 = -5.0 m·s⁻²
The negative sign tells you that the object is <em>slowing down</em>, i.e., it is <em>decelerating</em>.
 
        
             
        
        
        
Answer:
youre gonna have to include the answers for me to help
Explanation:
 
        
             
        
        
        
Mass of copper : 0.165 g
<h3>Further explanation</h3>
Given
5.0 A over 100 seconds
Required
Mass of copper
Solution
Faraday's law:
<em>The mass of the substance formed at each electrode is proportional to the electric current flowing in the electrolysis</em>
<em /> <em />
<em />
e = Ar / valence = eqivalent weight
i = current
t = time
W = weight
CuSO₄ ----> Cu²⁺ + SO₄²⁻
Cu ----> Cu²⁺ + 2e
 e = Ar/2
= 63,5/2 = 31,75
