When PH = -㏒[H3O+]
and we have PH = 5.061
by substitution:
∴ [ H3O+] = 10^-5.061 = 8.7x10^-6
when we have Ka = [CH3COO-][H3O+] / [CH3COOH]
we have Ka = 1.8x10^-5 & [H3O+] = 8.7x10^-6m & [CH3COOH] = 0.5 m
by substitution in Ka formula:
1.8x10^-5 = [CH3COO-]*(8.7x10^-6) / 0.5
∴[CH3COO-] = 1.034
∴we need to add 1.034 mol of sodium acetate
Answer:
C3F7
'Tri' means 3
Tricarbon means 3 carbon
"Hepta" means 7
Fluoridez molecular formula is "F"
hence F7
Answer:
Molecular formula = C₅H₁₀
Explanation:
From the question given above, the following data were obtained:
Empirical formula of compound => CH₂
Molar mass of compound = 70.1 amu
Molecular formula of compound =...?
The molecular formula of a compound is usually a multiple (n) of the empirical formula i.e
Molecular formula = [CH₂]ₙ
Thus, to obtain the molecular formula of the compound, we must first determine the value of n. The value of n can be obtained as follow:
[CH₂]ₙ = 70.1
[12 + (2×1)]n = 70.1
[12 + 2]n = 70.1
14n = 70.1
Divide both side by 14
n = 70.1 / 14
n = 5
Molecular formula = [CH₂]ₙ
Molecular formula = [CH₂]₅
Molecular formula = C₅H₁₀
Thus, the Molecular formula of the compound is C₅H₁₀.
The answer is definitely A