1s^2 2s^2 2p^6
This is the electron configuration of 02-
It is also known as noble gas like configuration and in general it is stable if oxygen is like that in a compound (8 electrons in its 2s and 2p orbitals combined)
equal moles of C8H18 and O2 are reacted to give equal no. of moles of CO2.
mole ratio of C8H18 =(1/2) x 8 = 4 moles
mole ratio of O2 = (1/25) x 4 = 0.16 moles
so, limiting reagent is O2
the no. of moles of CO2 formed = 16 x 0.16 = 2.56 moles
weight of CO2 formed (theoretical weight) = 2.56 x 44 = 112.64
Percentage yield =(practical yiel/theoretical yield) x 100 = (28.16/112.64) x100 = 25%
Answer: second option: mole ratio.
Explanation:
The coefficients of the chemical equation, when balanced, indicate the number ratio in which compounds combine with each other.
In the given equation, <span>Mg+2HCl -->MgCl₂+H₂
1 mole of Mg combines with 2 moles of HCl and produce 1 mole of MgCl₂ and 1 mol of H2.
So, the mole ratio is
1 mol Mg : 2 mol HCl : 1 mol MgCl₂ : 1 mol H₂.
In general, in a balanced equation of the kind aA + bB → cC + dD
The mole ratio is:
a mol of A : b mol of B : c mol of C : d mol D.
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Answer:
Alpha radiation
Explanation:
Polonium-212 decays to lead-208 by emission of an alpha particle according to the following equation.
²¹²₈₄ Po →²⁰⁸₈₂ Pb +⁴₂ He + Energy.
Te alpha particle is a helium particle. It has 2 protons and 2 neutrons.