Answer:
MgO + H₂
Explanation:
The products of reaction is MgO  and hydrogen gas. 
This is a single displacement reaction. 
In this reaction, the possibility of the reaction is determined by position of the atoms on the activity series. 
  Mg is higher than H on the activity series, so it is more reactive and it then displaces the hydrogen in water; 
             Mg + H₂O → MgO + H₂
  
        
             
        
        
        
Answer: Option (d) is the correct answer.
Explanation:
Electronegativity value of hydrogen is 2.2.
Electronegativity value of chlorine is 3.16.
Electronegativity value of carbon is 2.55.
Electronegativity value of oxygen is 3.44.
Electronegativity value of nitrogen is 3.04.
Electronegativity value of sodium is 0.93.
Electronegativity value of iodine is 2.66.
Therefore, calculate the electronegativity difference between the bonded atoms as follows.
- Electronegativity difference of HCl = Electronegativity value of chlorine - electronegativity value of hydrogen 
                                                           = 3.16 - 2.2
                                                           = 0.96
- Electronegativity difference of CO = Electronegativity value of oxygen - electronegativity value of carbon
                                                           =  3.44 - 2.55
                                                           = 0.89
- Electronegativity difference of  = Electronegativity value of nitrogen - electronegativity value of nitrogen = Electronegativity value of nitrogen - electronegativity value of nitrogen
                                                            = 3.04 - 3.04
                                                            = 0
- Electronegativity difference of NaI = Electronegativity value of iodine - electronegativity value of sodium
                                                           = 2.66 - 0.93
                                                           = 1.73
So, we can see that highest electronegativity difference is 1.73 and it is shown by NaI molecule.
Thus, we can conclude that a group 1 alkali metal bonded to iodide, such as NaI has the greatest electronegativity difference between the bonded atoms.
 
        
                    
             
        
        
        
Answer:
The pressure of the gas is increased by reducing the volume at constant temperature. ... The average velocity of the molecules is increased by a factor of 2.
Explanation:
 
        
             
        
        
        

B. Add 233 g of KCl to a 3.5 L container; then add enough water to dissolve the KCl and fill the container to the 3.5 L mark. 
 
        
             
        
        
        
Dipyrithione is a chemical with formula, C₁₀H₈N₂O₂S₂. This means that each molecule of the substance has two (2) atoms of nitrogen. By using the dimensional analysis and Avogadro's number, equal to 6.022 x 10²³, we calculate for the answer as shown below.
    n = (8.2 x 10²⁴ atoms N)(1 molecule dipyrithione/ 2 atoms of N)(1 mole dipyrithione/ 6.022 x 10²³ molecules dipyrithione)
Simplifying,
  n = 6.8 moles dipyrithione
<em>ANSWER: 6.8 moles</em>