Answer: 7.98 grams of  are produced if 10.7 grams of
 are produced if 10.7 grams of  are reacted.
 are reacted.
Explanation:
To calculate the number of moles, we use the equation:
 .....(1)
      .....(1)  
Putting values in equation 1, we get:
 
  
The chemical equation for the reaction is
 
By Stoichiometry of the reaction:
2 moles of  produce = 1 mole of
 produce = 1 mole of  
So, 0.100 moles of  produce=
 produce=  of
 of  
  
Mass of  =
 = 
  
Hence 7.98 grams of  are produced if 10.7 grams of
 are produced if 10.7 grams of  are reacted.
 are reacted.
 
        
             
        
        
        
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Answer:
Mass = 55.52 g
Explanation:
Given data:
Number of atoms of Li = 4.81×10²⁴ atom
Number of grams = ?
Solution:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
For example,
1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen
For Li:
 4.81×10²⁴ atom × 1 mol / 6.022 × 10²³ atom
8 moles
Mass in gram:
Mass = number of moles × molar mass
Mass = 8 mol × 6.94 g/mol
Mass = 55.52 g
 
        
             
        
        
        
The answer is: [D]: a reactant.
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Answer:
Japan, China, the U.S., Indonesia, Chinese Taipei and South Korea have been named by Pew Charitable Trusts on a “shame list” of countries responsible for overfishing tuna in the Pacific. According to Pew, the “Pacific 6” are responsible for 80 percent — 111,482 metric tons in 2011 — of the annual catch of bigeye tuna. 
Hope it will help you