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Chemistry
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What is a mole?

A mole is a unit of amount of substance. One mole is the number of atoms of carbon in 12g of the carbon-12 isotope(when 12 is the relative atomic mass) , which is 6.02 x 1023 . This means that...

HG
Answered by Hunter G. Chemistry tutor
5645 Views

Describe the features of a benzene ring that define its reactivity. How does phenol differ from this?

The six carbon atoms in benzene are arranged in a planar ring, with one hydrogen atom bonded to each carbon. Each carbon atom has 4 valence electrons, and uses three of them to form single bonds with the ...

EF
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Use the periodic table to write symbols for the following species: 19 protons, 20 neutrons, 19 electrons

when looking at an atom on the periodic table, we see that within the box are two numbers: one at the top and one at the bottom. the top number represents the atomic number and the bottom number represent...

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Answered by Alisha I. Chemistry tutor
3144 Views

Explain what oxidation and reduction means in terms of electrons.

The oxidation of a species, in terms of electrons, is when the species loses electrons. The reduction of a species, on another hand, is when the species gains electrons in a reaction.

IA
Answered by Ishaan A. Chemistry tutor
2404 Views

25cm3 of a 0.10moldm-3 solution of sodium hydroxide reacts exactly in a titration with 15cm3 HCl. What is the concentration of the hydrochloric acid?

First, write a balanced chemical equation to determine the ratio of the reacting species: NaOH + HCl --> NaCl + H2O Sodium hydroxide and hydrochloric acid react in a 1:1 ratio,...

EF
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