The electrolysis of water breaks up the water molecules into hydrogen and oxygen, as shown in this photo. Why is the volume of the hydrogen that is collected twice the volume of the oxygen collected?
a. Hydrogen atoms are twice as big as oxygen atoms.
b. There are twice as many hydrogen atoms in water as there are oxygen atoms.
c. Oxygen atoms are 16 times as massive as hydrogen atoms.
d. A gas formed from oxygen gas particles takes up twice as much space as a gas formed from the same number of hydrogen gas particles under identical conditions.
e. The hydrogen occurs as H2 molecules of two atoms each while the oxygen is just single O atoms.
Question 2
Which of these is NOT true about the early Arab practice of alchemy?
a. Alchemists were looking for the secrets of eternal life and how to turn inexpensive materials into gold.
b. Alchemists were early experimental scientists and observers.
c. Alchemy was pseudoscience, rather than involving any form of research.
d. Alchemists were important predecessors of modern chemists.
e. Alchemists studied materials and how they changed.
A vertebrate digestive system, as shown in the human.
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For toluene (shown below), you would expect to see which m/z fragment in the mass spectrum?