The answer is B.) The dissolving of a sugar cube in a cup of coffee.
The balanced combustion reaction of octane ( which is a component of gasoline) can be written as:
C₈H₈ + O₂→ 8 CO₂ + 9 H₂O.
(a) For combustion of one mole of butane, moles of oxygen is required. So, for combustion of 1.60 mole of butane, Oxygen required is mole= 20 moles.
(b) On combustion of one mole of butane 8 moles of carbon dioxide (CO₂) is produced. Hence when 0.19 moles of butane is burnt, carbon dioxide produced is= 0.19 X 8 moles= 1.52 moles.
(c) Molar mass of butane is= (8 X12)+ (8 X 1)= 104 g/mol and molar mass of
O₂ is 32 g/mol.
As per balanced combustion reaction, to burn one mole butane or 104 g butane (25/2) mole of oxygen or (25X32)/2 g= 400 g O₂ is required. So to burn 1.15 g of butane the amount of oxygen required is= g= 4.42 g.
Here we have explain that the maximum possible electrons present in nitrogen valence shell is 8 whereas in phosphorous 12 valence electrons are present.
Although both nitrogen (N) and phosphorous (P) belongs to the same series there are several properties which are different between both the element. The number of electrons present in nitrogen is seven which are present in the -s and -p orbitals. The electronic configuration of nitrogen is 1s²2s²2p³. In which the outermost electrons are the valence electrons i.e. 5 valence electrons are present. The maximum orbitals are possible under the principal quantum number 2 are -s and -p orbitals. Now the maximum capacity of the p orbital to contain 6 electrons, as it is half filled in nitrogen another 3 electrons can be incorporated. Thus the maximum number of electrons can be present in nitrogen is 10 among which 8 is the valence electrons.
On the other hand there are 15 electrons in phosphorous the electronic configuration is 1s²2s²2p⁶3s²3p³. Now the principal quantum number 3 can have three orbitals -s, -p and -d. So another 13 electrons can be incorporated (3 in -p orbital and 10 in -d orbital) among which upto 12 electrons can be its valence electrons.
Answer:
The common name for 2-butanone, a readily available solvent, is B-butanone
Answer:
Beryllium Fluoride (BeF2) is an ionic compound