Answer:
a)= 0.025602u
b) = 23.848MeV
c) N = 1.546 × 10¹³
Explanation:
The reaction is
²₁H   +   ²₁H   ⇄   ⁴₂H + Q
a) The mass difference is 
Δm = 2m(²₁H) - m (⁴₂H)
        = 2(2.014102u) - 4.002602u
         = 0.025602u
b) Use the Einstein mass energy relation ship
The enegy  release is the mass difference times 931.5MeV/U
E = (0.025602) (931.5)
    = 23.848MeV
c) 
the number of reaction need per seconds is 
N = Q/E
      = 59W/ 23.848MeV
   
N = 1.546 × 10¹³
 
        
             
        
        
        
Answer:
Lone pairs cause bond angles to deviate away from the ideal bond angles
Explanation:
Bonded electrons are stabilized and clustered between the bonding electrons meaning they are much closer together. Non-bonding electrons however are not being shared between any atoms which allows them to roam a little further spreading the charge density over a larger space and therefore interfering with what would be an expected bond angle
 
        
             
        
        
        
1).  an electric motor running
Electrical energy is changing into kinetic energy and a little bit of heat
2).  light a match
The chemical energy stored in the match head changes into light and heat energy.
3).  a light bulb
Electrical energy is changed into light and heat energy.
        
             
        
        
        
v₀ = initial speed as tarzan grabs the vine = 5.3 m/s 
v = final speed as the tarzan reach the maximum height = 0 m/s 
h = maximum height gained by the tarzan 
m = mass of tarzan 
using conservation of energy 
initial kinetic energy = final kinetic energy + potential energy 
(0.5) m v²₀ = (0.5) m v² + m g h 
(0.5) v²₀ = (0.5) v² + g h 
(0.5) (5.3)² = (0.5) (0)² + (9.8) h 
h = 1.43 m