Newton's F=ma, which means the force (F) acting on an object is equal to the mass (m) of an object times its acceleration (a)
Explanation:
 F = ma, or force is equal to mass times acceleration.
 
        
             
        
        
        
In 1 molecule of the compound C₆H₁₂O₂ there are 12 moles of hydrogen atoms
<h3>Further explanation</h3>
Given
C₆H₁₂O₂ compound
Required
moles of Hydrogen
Solution
In a compound, there is a mole ratio of the constituent elements.
The empirical formula is the smallest comparison of atoms of compound forming elements.  
A molecular formula is a formula that shows the number of atomic elements that make up a compound.  
In the C₆H₁₂O₂ compound, there are 3 forming elements: C, H and O
The number of each element is indicated by its subscript
C: 6 moles
H = 12 moles
O = 2 moles
 
        
             
        
        
        
The mass of ammonium chloride that must be added is : ( A ) 4.7 g 
<u>Given data :</u>
Volume of water ( V )  = 250 mL = 0.25 L
pH of solution = 4.85 
Kb = 1.8 * 10⁻⁵
Kw = 10⁻¹⁴
Given that the dissolution of NH₄Cl gives NH₄⁺⁺ and Cl⁻ ions the equation is written as :
NH₄CI  +  H₂O  ⇄  NH₃ + H₃O⁺
where conc of H₃O⁺  
[ H₃O⁺ ] =  and Ka = Kw / Kb
   and Ka = Kw / Kb 
∴ Ka = 5.56 * 10⁻¹⁰
Next step : Determine the concentration of H₃O⁺  in the solution 
pH = - log [ H₃O⁺ ] = 4.85 
∴ [ H₃O⁺ ] in the solution = 1.14125 * 10⁻⁵ 
Next step : Determine the concentration of NH₄CI in the solution 
C = [ H₃O⁺ ]² / Ka 
   = ( 1.14125 * 10⁻⁵ )² /  5.56 * 10⁻¹⁰ 
   = 0.359 mol / L
Determine the number of moles of NH₄CI in the solution
n = C . V 
   = 0.359 mol / L  * 0.25 L =  0.08979 mole
Final step : determine the mass of ammonium chloride that must be added to 250 mL 
mass = n * molar mass 
          = 0.08979 * 53.5 g/mol
          = 4.80 g  ≈ 4.7 grams 
Therefore we can conclude that the mass of ammonium chloride that must be added is 4.7 g 
Learn more about ammonium chloride : brainly.com/question/13050932
 
        
             
        
        
        
Answer:
Explanation:
The chemical equation is:
There are several definitions of acid and bases: Arrhenius', Bronsted-Lowry's and Lewis'.
Bronsted-Lowry model defines and <em>acid</em> as a donor of protons, H⁺.
In the given equation HNO₃ is such substance: it releases an donates its hdyrogen to form the H₃O⁺ ion.
On the other hand, a <em>base</em> is a substance that accepts protons.
In the reaction shown, H₂O accepts the proton from HNO₃ to form H₃O⁺.
Thus, H₂O is a base.
In turn, on the reactant sides the substances can be classified as acids or bases.
H₃O⁺ contain an hydrogen that can be donated and form H₂O; thus, it is an acid (the conjugated acid), and NO₃⁻ can accept a proton to form HNO₃; thus it is a base (the conjugated base).
 
        
             
        
        
        
It bonds atoms together to create molecules