POH will be -log[conc of OH]
-log (3.9E-08) = 7.409
pH = 14- pOH
pH = 14 - 7.409
pH = 6.59
Answer:
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Answer:
Atoms
Explanation:
According to the law of conservation of matter, matter is neither created nor destroyed, so we must have the same number and kind of atoms after the chemical change as were present before the chemical change.
Answer: 17.2 g
Explanation:
To calculate the moles :
The balanced chemical equation is:
According to stoichiometry :
4 moles of 
produce = 4 moles of 
Thus 0.085 moles of will require=
of
Mass of 
Thus 17.2 g of will be produced form 20.0 g of HgS.
To find the acceleration, use the formula: force= mass x acceleration.
12.5 N = 10 x Acceleration
Acceleration = 12.5 / 10
Acceleration = 1.25
Hope this helps :)
