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Example Q: See the reaction: CH₄ + Br₂ --> CH₃Br + HBr, with bond energies as follows (in kJ/mol) :C-H = 412, Br-Br = 193,C-Br = x,H-Br = 366Overall energy = –51. Calcu...

Tennessee Williams creates a sense of fantasy and delusion through the development of his character Blanche. Blanche is introduced as Stella’s sister, who has moved for initially unknown circumstances and...

Protons = 7Neutrons = 8Electrons = 7This N-15 isotope has an atomic number of 7 - this is equivalent to the number of protons.The atom is not charged and so will have the same number of electrons as proto...

DNA is made up of two strands that form a double helix structure. DNA is comprised of four different nucleotides, all made up of a sugar and phosphate group and one of four bases - A, T, C or G. These bas...

The mitochondria are where cellular respiration takes place. This organelle contains all the enzymes necessary for aerobic respiration (respiration that uses oxygen) to take place and produce energy for t...