Answer:
Isotopes of an element are atoms of the same element that have different number of neutrons.
 
        
                    
             
        
        
        
Answer:
36s^5
Explanation:
We have;
M2X3 (s)------> 2M^3+(aq)  + 3X^2-(aq)
If [M^3+(aq)] = [X^2-(aq)] = s
We then have;
Ksp = (2s)^2 * (3s)^3
Ksp = 4s^2 * 9s^3
Ksp = 36s^5
Note that Ksp is known as the solubility product. It is an equilibrum equation that shows the solubility of a solute in water.
 
        
             
        
        
        
Converting  temperature of 68°F to °C gives 20 °C.
Converting  temperature of 68°F to K gives 293 K.
<h3>What is temperature conversion?</h3>
Temperature conversion is the process of converting  the measurement units of the temperature recorded in a particular unit to another unit. 
The various units of Temperature include;
- degree Celsius
- degree Fahrenheit
- degree Kelvin
Temperature is measured with thermometer and it records the hotness or coldness of a body.
<h3>Converting  68°F to °C</h3>
F = 1.8C + 32
(F - 32/1.8) = C
(68 - 32) / 1.8 = C
20 ⁰C = 68 ⁰F
<h3>Converting  20°C to K</h3>
0 °C  = 273 K
20 °C  = 273 + 20 = 293 K
Learn more about temperature conversion here: brainly.com/question/23419049
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Iron oxide is rust. So oil would be an inhibitor.