<h3>
Answer:</h3>
1379.4 Joules 
<h3>
Explanation:</h3>
- The quantity of heat is calculated multiplying the mass of a substance by heat capacity and the change in temperature.
 
Therefore;
Quantity of heat = Mass × specific heat capacity × Change in temperature 
Q = mcΔT 
In this case;
The substance dissolved in water gained heat while water lost heat energy.
Thus, Heat gained by the substance = heat lost by water
Heat associated with the water  
Mass of water = 75 g
Change in temperature = 4.4°C
Specific heat capacity =  4.18 J/g·⁰C
Heat = mcΔT 
         = 75 g × 4.18 J/g·⁰C × 4.4 °C 
         =1379.4 Joules 
 
        
             
        
        
        
+1
Explanation:
To solve this problem, we need to set up an algebraic equation. Let us first understand the meaning of oxidation number. 
The oxidation number is the formal charge assigned to an atom present in a molecule or formula unit
The algebraic sum of all oxidation numbers of atoms in an ion containing more than one kind of atom is the charge on the ion. 
The algebraic sum of all oxidation number of atoms in a neutral compound is zero;
    The radical NO₃ has a formal charge of -1; 
  let the oxidation number of Li = x 
  x + (-1) = 0 
   x = + 1
learn more: 
Oxidation number brainly.com/question/10017129
#learnwithBrainly
 
        
             
        
        
        
Answer:
d) They're studying something for which they cant do an experiment 
Explanation:
 
        
                    
             
        
        
        
So we know the number of moles of each compound. If we need to know the concentration we must know the number of moles that the compounds react with...
        
                    
             
        
        
        
<span>In normal conditions gas particles remain very distant from each other. They rarely collide and are stable. When temperature increases the gas particles begin to move faster and collide more, reducing the distance. When pressure increases the gas particles also pick up kinetic speed and are also closer to each other.</span>