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Chemistry
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The molecular formula of TCDD is C12H4O2Cl4. Chlorine exists as two isotopes 35Cl (75%) and 37Cl (25%). How many molecular ion peaks are there? What is the mass of the most abundant one?

Because chlorine exists as two isotopes, two molecular ions will be present, and their relative heights will correspond to the abundances of the isotopes. The tallest peak will be 3 times the height of th...

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Answered by Ana D. Chemistry tutor
6421 Views

What is the mass percentage of carbon in a CO2 molecule?

First we need to calculate the total mass of a CO2 molecule. This is done by summing up the individual masses of all the atoms. To find these, we look at the periodic table and see that the mas...

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Answered by Ana D. Chemistry tutor
4004 Views

explain why the electronegativity of fluorine is greater than that chlorine

The electrons in chlorine are further away from the nucleus and in a higher energy level (3p for chlorine as apposed to 2p for fluorine). Chlorines electrons are better shielded and so feel less nuclear c...

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Answered by Max G. Chemistry tutor
12392 Views

Ionic compounds have high melting points: Explain why and explain why Calcium Oxide has a higher melting point than Lithium Chloride

Ionic compounds are formed when electrostatic attractions form between oppositely charged ions. These attractions are strong and so require a large amount of energy to break. This energy is provided in th...

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Answered by Sam M. Chemistry tutor
22043 Views

Predict the bond angles and shape of a molecule of ammonia.

  1. There are four (4) groups of electrons around the central nitrogen atom (3 shared pairs and one lone pair of electrons)2) According to electron repulsion theory, the electrons move further away from...
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Answered by Nathan B. Chemistry tutor
4479 Views

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