Answer : The final equilibrium temperature of the water and iron is, 537.12 K
Explanation :
In this problem we assumed that heat given by the hot body is equal to the heat taken by the cold body.


where,
 = specific heat of iron =  560 J/(kg.K)
 = specific heat of iron =  560 J/(kg.K)
 = specific heat of water = 4186 J/(kg.K)
 = specific heat of water = 4186 J/(kg.K)
 = mass of iron = 825 g
 = mass of iron = 825 g
 = mass of water = 40 g
 = mass of water = 40 g
 = final temperature of water and iron = ?
 = final temperature of water and iron = ?
 = initial temperature of iron =
 = initial temperature of iron = 
 = initial temperature of water =
 = initial temperature of water = 
Now put all the given values in the above formula, we get:


Therefore, the final equilibrium temperature of the water and iron is, 537.12 K
 
        
             
        
        
        
Answer: 39.948 grams
Explanation:
The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Ar, or 39.948 grams
 
        
             
        
        
        
Answer:
<h2>9.03 × 10²³ atoms </h2>
Explanation:
The number of atoms of Al can be found by using the formula
<h3>N = n × L</h3>
where n is the number of moles 
N is the number of entities
L is the Avogadro's constant which is 
6.02 × 10²³ entities
From the question we have
N = 1.5 × 6.02 × 10²³
We have the final answer as
<h3>9.03 × 10²³ atoms</h3>
Hope this helps you
 
        
             
        
        
        
Energy is released by the formation of chemical bonds, and energy is 
absorbed when the bonds are broken.
<h3>What is a chemical reaction?</h3>
A chemical reaction involves the formation of new compounds from 
reactants . It involves the formation and breaking of bonds in the 
elements.
Energy is released by the formation of chemical bonds and this type of 
reaction is referred to as exothermic while energy is absorbed when the 
bonds are broken and is referred to as an endothermic reaction.
Read more about Chemical reaction here brainly.com/question/16416932
 
        
                    
             
        
        
        
Answer:
placing the reactants on a hot plate
Explanation:
If the temperature goes up, the reaction rate will increase. Because the particle will move faster and makes the kinetic energy larger.