A semiconductor conducts electricity at high temperatures, but not at low temperatures. At high temperatures, metalloids act like metals and conduct electricity.
Explanation:
start using quizlet. it has every anwser
 
        
                    
             
        
        
        
Answer:B
Explanation:
Atoms and molecules are always moving or vibrating. (just took the test)
 
        
                    
             
        
        
        
It would be water. Since the body is 60-75% water, it is important in chemical reactions within the body.
        
             
        
        
        
Answer:
0.209 mol/L
Explanation:
Given data
- Mass of copper(lI) sulfate (solute): 11.7 g
- Volume of solution: 350 mL = 0.350 L
The molar mass of copper(Il) sulfate is 159.61 g/mol. The moles corresponding to 11.7 grams are:
11.7 g × (1 mol/159.61 g) = 0.0733 mol
The molarity of copper(Il) sulfate is:
M = moles of solute / liters of solution
M = 0.0733 mol / 0.350 L
M = 0.209 mol/L