Cover with metal .Any elements other than hydrozen and helium concentration shows an absorbance
Answer is: molarity of hydrofluoric solution is 0.09 M.
Chemical reaction: HF(aq) + KOH(aq) → KF(aq) + H₂O(l).
V(HF) = 30.0 mL.
c(KOH) = 0.122 M.
V(KOH) = 22.15 mL:
c(HF) = ?.
From chemical reaction: n(HF) : n(KOH) = 1 : 1.
n(HF) = n(KOH).
c(HF) · V(HF) = c(KOH) · V(KOH).
c(HF) = c(KOH) · V(KOH) ÷ V(HF).
c(HF) = 0.122 M · 22.15 mL ÷ 30 mL:
c(HF) = 0.09 M.
The property that determines an atom;s ability to attract electrons shared in a chemical bond is electronegativity. The correct answer is C.
Kr= krypton
K= potassium
C=carbon
En= neon
Si= silicon
Au= gold
Ni= nitrogen
Br= berillium
Mg=magnesium
Mn= mangenese
Al: aluminum
Answer: The formula of the hydrated alumina is 
Explanation:
Decomposition of hydrated alumina is given by:
Molar mass of 
= 101.96 g/mol
According to stoichiometry:
(101.96+18x) g of 
decomposes to give 101.96 g of
Thus 5.000 g of
decomposes to give=
of H_2O
But it is given 5.000 g of a sample of hydrated salt was found to contain 2.6763 g of unhydrated salt
Thus we can equate the two equations:
Thus the formula of the hydrated alumina is
