Explanation:
1 miole of Fe2O is 6.22 × 10^-23
5mole of Fe2O = 5×6.22×10^-23
=31.1×10^-23
Answer:
Acidic buffer solutions are commonly made from a weak acid and one of its salts - often a sodium salt. A common example would be a mixture of ethanoic acid and sodium ethanoate in solution. In this case, if the solution contained equal molar concentrations of both the acid and the salt, it would have a pH of 4.76.
Explanation:
correct me if I'm wrong ❤️
the Empirical formula of the compound is calculated as follows
find the moles of each element
moles = mass/molar mass
that is Magnesium= 0.564 g /24 g/mol = 0.0235 moles
For oxygen = 0.376 g /16 g/mol= 0.0235 moles
find the mole ratio by dividing both moles of by 0.0235 moles
magnesium = 0.0235/0.0235= 1mole
oxygen= 0.0235 /0.0235= 1mole
therefore the empirical formula = MgO
Answer:
Explanation:
From the question we are told that:
Mass of zinc 
Initial conc of HCl 
Initial volume of HCl 
Molar mass of zinc 
Generally the equation for reaction is mathematically given by
Generally the equation for moles of zinc 
is mathematically given by
Generally the equation for moles of 
is mathematically given by
Generally the reacted moles of HCl ![HCl_[reacted]](https://tex.z-dn.net/?f=HCl_%5Breacted%5D)
is mathematically given by
Since
Zn:HCl =1:2
Therefore
![HCl_[reacted]=0.038*\frac{2}{1}](https://tex.z-dn.net/?f=HCl_%5Breacted%5D%3D0.038%2A%5Cfrac%7B2%7D%7B1%7D)
![HCl_[reacted]=0.076mol \ HCl](https://tex.z-dn.net/?f=HCl_%5Breacted%5D%3D0.076mol%20%5C%20HCl)
Generally the moles of HCl after Zn oxidization X is mathematically given by
Generally the conc of hydrochloride acid X is mathematically given by
Therefore Conc of HCl
