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Gemiola [76]
3 years ago
11

A mole is defined as the number of atoms in an exact mass of which isotope?

Physics
1 answer:
alisha [4.7K]3 years ago
7 0

Answer:

Isotope of carbon-12.

Explanation:

The MOLE  is a unit of measurement of the amount of a pure substance which contains exactly the same number of chemical units which could be (Atoms, molecules etc.) posses atoms in exactly 12 grams of isotope of carbon-12 (i.e., 6.022\times 10^{23}).

So, The mole is the Notation  used for an amount 6.022\times 10^{23}  as same the 12 number is used for dozen for making count of Bananas and many more.

The 6.022\times 10^{23} is known as the fundamental constant names Avogadro's number (N_{A}), It is in the honor of Italian scientist Amedeo Avogadro.

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The quantity demanded of the product will decrease as the price of the product increases, this his is true for both Perfectly-elastic and relatively elastic products. It will follow the law of Demand and Supply.

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4 years ago
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Each nitrogen molecule consists of two atoms of nitrogen that are bonded by a triple covalent bond. This is because each nitrogen atom has 5 valence electrons. Each atom can complete its octet by sharing three electrons.

I hope this helps!

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3 years ago
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Gold has a density of 19.32 g/cm3. what is the volume of a sample of gold with a mass of 27.63 grams?
schepotkina [342]
Answer:  The volume is:  " 1.430 cm³ " .
_____________________________
Explanation:  
________________________
Volume, " V  = ? ; (unknown, we need to solve for this).
Density,  "D  = 19.32 g / cm³ ; 
mass , "m" = 27.63 g ; 
_____________________________________________
The formula for density is:  
____________________________________________
  D = m / V ;   Divide each side of the equation by:  "(1/m)" ;
                    to isolate " V" on one side of the equation; and to solve for "V" ; 
____________________________________________
1/m)*D = (1/m) * (m / V) ;
_______________________________
    to get:   
_______________________________
       D/m = ; ↔  1 / V ;  Take the reciprocal of EACH SIDE; to isolate "V" on each side of the equation:    
_____________________________
      m / D = V/1 ↔ V = m / D ;
_____________________________
    V = m / D ; 
_______________________________
         Now, plug in our given values for mass, "m" ; and Density, D";              to solve for "Volume, V " ;
_____________________________________
    V  =  m / D  =  (27.63 g)  ÷  (<span>19.32 g / cm</span>³)  ;                
 
                       =  (27.63 g) * (1 cm³ / 19.32 g) ;
 
                       =   (27.63 ÷ 19.32)  cm³  ;
  
                       =   1.4301242236024845 cm³ ;

                                              → Round to "4 significant figures" ; 
                       =   1.430 cm³ .
____________________________________________
   The volume is:  " 1.430 cm³ " .
______________________________________________
4 0
3 years ago
Match these items and the phrases with which they are associated.
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3 years ago
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