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Chemistry
GCSE

Why does iodine have a higher boiling point than chlorine?

Iodine is a larger molecule, with more electrons, than chlorine. Therefore Iodine has stronger intermolecular forces than chlorine, which require more energy to break. This results in Iodine having a high...

Answered by Ben W. • Chemistry tutor
26334 Views

Explain covalent bonding and give an example of a simple covalent molecule.

A covalent bond is a shared pair of electrons between 2 atoms.An example of a simple covalent molecule is CH4 (methane)

Answered by Zoe S. • Chemistry tutor
1694 Views

25cm3 NaOH was titrated with 0.05mol dm-3 HCl. 21.5m3 of HCl neutralised 25cm3 of NaOH. What is the concentration of NaOH in mol dm-3?

NaOH + HCl --> NaCl + H2O 1 : 1 : 1 moles (mol) = concentration (mol dm-3) x volume (dm3)

Answered by Britta A. • Chemistry tutor
4263 Views

Name Group 0 in the periodic table. What is the tree in boiling points and why?

The Noble GasesThe boiling points increase as you go down the group. This is because the atoms get larger and the intermolecular forces become more numerous and stronger hence more energy is needed to bre...

Answered by Ellie B. • Chemistry tutor
1741 Views

Give the name of the monomer used to make poly(chloroethene). And describe how monomer molecules form polymer molecules.

  1. Briefly explain the etymology of hydrocarbon names and how polymers are named. The answer is therfore, chloroethene.
    2. Draw a structure for chloroethene and show in diagram how chloroethene p...
Answered by Shreyasi D. • Chemistry tutor
11253 Views

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