The Ring of fire most seismically and volcanically active zone in the world.
Answer:
⁵⁸Fe
Explanation:
mass number of the isotope = number of protons + number of neutrons
mass number of the isotope = 26 + 32 = 58 a.m.u
a.m.u - atomic mass units
Knowing that the element have 26 protons and 26 electrons it have to be an isotope of iron.
⁵⁸Fe
The volume of HCOOH is 0.003 Lt and the volume of HCOONa is 0.017 LT.
Explanation:
For acidic buffer
PH = Pka + log ![\frac{salt}{acid}](https://tex.z-dn.net/?f=%5Cfrac%7Bsalt%7D%7Bacid%7D)
4.25 = 3.75 + log ![\frac{salt}{acid}](https://tex.z-dn.net/?f=%5Cfrac%7Bsalt%7D%7Bacid%7D)
log
= 0.75
log
= 5.62 is considered as equation 1.
Let V₁ ml of HCOOH and V₂ml of HCOONA was mixed and the final volume is 100 ml .
V₁ *0.5 + V₂ *0.5 =0.1 * 100
V₁+V₂ =
= 20 is the second equation.
Now concentration of salt and acid are
V₂ [salt] = 0.5/100 and v₁ [acid] = 0.5/100
by substituting these in equation 1 we get,
= 5.62
V₂ = V₁ * 5.62 is the 3 rd equation
by solving 2 and 3 we get,
5.62 V₁ + V₁ = 20
= 6.62 V₁ = 20
V₁ = 3.02 ml
V₁ = 0.003 LT
V₂ = V₁ * 5.62
V₂ = 0.017 LT
Hence the volume of HCOOH is 0.003 Lt and the volume of HCOONa is 0.017 LT.
58 ce is the correct answer!