Answer:
B
Explanation:
I hope it helps you good luck
 
        
             
        
        
        
Because there are so many different values of numbers, it would be impractical to use 1Ω, 2Ω, 3Ω... etc... Using colored bands helps make reading it a little easier to the trained eye. There are hundreds of thousands, if not tens of millions of different resistors would need to exist to cover every value. So you just use something called "preferred values" with their resistance values posted on them instead.
        
             
        
        
        
Answer:
What mass (g) of barium iodide is contained in 188 mL of a barium iodide solution that has an iodide ion concentration of 0.532 M?
A) 19.6
B) 39.1
C) 19,600
D) 39,100
E) 276
The correct answer to the question is 
B) 39.1  grams
Explanation:
To solve the question
The molarity ratio is given by 
188 ml of 0.532 M solution of iodide. 
Therefore we have number of moles = 0.188 × 0.532 M = 0.100016 Moles
To find the mass, we note that the Number of moles =  from which we have
 from which we have
Mass = Number of moles × molar mass
Where the molar mass of Barium Iodide = 391.136 g/mol
 = 0.100016 moles ×391.136 g/mol = 39.12 g
 
        
             
        
        
        
Answer:
protons and neutrons
Explanation:
those particles account for 99.99% of mass