75.0 mL in liters:
75.0 / 1000 => 0.075 L
1 mole -------------------- 22.4 L ( at STP)
( moles Hg) ------------- 0.075 L
moles Hg = 0.075 x 1 / 22.4
moles = 0.075 / 22.4
= 0.00334 moles of Hg
Hg => 200.59 u
1 mole Hg ----------------- 200.59 g
<span>0.00334 moles Hg ----- ( mass Hg )
</span>
mass Hg = 200.59 x 0.00334 / 1
mass Hg = 0.6699 / 1
= 0.6699 g of Hg
        
             
        
        
        
374u
187u
C₁₄H₂₂N₄O₈
Explanation:
To find the molecular weight of the compound C₁₄H₂₂N₄O₈ we simply sum that atomic masses of the given elements in the compound. 
  The empirical weight is determined by using the simplest ratio of the elements involved in the compound;
 Molecular weight of C₁₄H₂₂N₄O₈; 
 atomic mass of C = 12g/mol
                            H = 1g/mol
                             N = 14g/mol
                             O = 16g/mol
  Molecular weight = 14(12) + 22(1) + 4(14) + 8(16)
                                 = 168 + 22 + 56 + 128 
                                  = 374u
Empirical weight: 
   Empirical formula: 
                         C₁₄    H₂₂      N₄     O₈
                          14  :    22 :    4  :     8 
    divide by 2: 
                           7   :    11    :    2  :    4 
      empirical formula  C₇H₁₁N₂O₄
      empirical weight = 
 = 
 = 187u
The molecular formula is the actual combination of atoms in a compound. so the molecular formula of the compound is C₁₄H₂₂N₄O₈
learn more: 
Molecular mass brainly.com/question/5546238
#learnwithBrainly
 
        
             
        
        
        
A. Carbon monoxide
b. Phosphorous trichloride
c.
d.nitrogen
e. Water- Hydrogen - Oxygen
f.
        
             
        
        
        
Answer:
Convention currents are found in the asthenosphere part present in the mantle of the Earth.
Explanation:
The Mantle is the middle layer of the earth surface extending up to 2900 kilometers.
Beneath the Mantle lies the core which contains molten rocks and materials called magma.
The materials are highly radioactive and immensely heated. These highly hot condition creates pressure on the middle layer (Mantle).
As a result, large convention currents are generated excessively