73. Silicon carbide, an abrasive, is made by the reaction of silicon dioxide with graphite.
SiO2 + 3C SIC + 2CO
If 100 g of SiO2 and 100 g of C are reacted as far as possible,
which one of the following statements will be correct? (Atomic
weight (g/mol): C =12, 0 =16, Si = 28)
A. 111 g of SiO2 will be left over.
B. 44 g of SiO2 will be left over.
C. 82 g of C will be left over.
D. 40 g of C will be left over.

the electronic configuration of an atom with eight electrons is 1s²2s²2p⁴. the orbital diagrams are shown in the figure.

as per the hunds rule:

1. electrons tend to avoid being in the same orbital as per as practicable.

2. electrons in different orbitals of the same energy will have their spin parallel.

this can be illustrated from the multiplicity of the orbitals of the atom. as there are four electrons in the p orbital and p orbital has 3 sub-shells. the electrons can be fed in different ways as shown in the figure but the correct orbital diagram will be as per the hunds rule.

your answers are a,b,,e and f

i hope this

1. they vary with a higher number because boiling is way hotter than melting

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :