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What are the general trends of alkali metals (group 1)?

Group 1 metals all have one outer electron, which is responisble for their properties. As you go down the group: the metals become more reactive. This is due to the increased number of electron shells which ...
JB
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Calculate the standard enthalpy of combustion of a methane sample by using the standard enthalpies of formation.

Write the equation and balance it. CH4 + 2O2 --> CO2 + 2H2O Assign the enthalpies of formation and the sign of the energy value with the corresponding molecule (Will demonstrate my technique if needed). e...
AC
Answered by Axel C. • Chemistry tutor
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How many peaks would you expect from a Hydrogen NMR of Ethane?

Ethane is a symmetric molecule, therefore both groups of hydrogens occur in the same region and not in two different regions (for example chloroethane would have two different regions). Using the n+1 rule, t...
DO
Answered by Daniel O. • Chemistry tutor
13242 Views

Describe how σ and π bonds form.

Sigma bonds form as a result of end on overlap of orbitals (pp, ss or sp) along the axis between two atoms' nuclei. Pi bonds form because of parallel overlap between p orbitals. A sigma bond forms a single b...
EJ
Answered by Eloise J. • Chemistry tutor
7792 Views

Explain why the 2nd Electron aiffinity of Chlorine is Endothermic whilst the first electron affinity is exothermic

With the first electron affinity, the chlorine atom is one electron from a full octet ( and is a neutral species). When you add an electron to the chlorine, the negatively charged electron is electrostatical...
HC
Answered by Hayden C. • Chemistry tutor
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