Search our library of homework questions

Top answers

All subjects

All levels

What is the difference between the empirical formula and molecular formula?

Both empirical and molecular formula give information about what different elements make up a compound. The empirical formula shows the simplest whole number ratio of the number of atoms of different elem...

Answered by Arvand V. • Chemistry tutor

15545 Views

What would be the pH of a reaction between potassium oxide and water?

Potassium oxide is an ionic compound: K₂O Made up of ions K⁺ and O^2-When added to the water the oxide reacts to form a hydroxide compound.K₂O + H₂O =...

Answered by Alice M. • Chemistry tutor

10124 Views

Explore the way in which authors present women in Bram Stoker’s Dracula and one other key Gothic text

Dracula and The Bloody Chamber present differing views on women, perhaps due to the zeitgeist within which they were produced. Dracula, although offering a strong female character in the form of Mina, fal...

Answered by Jessica D. • English Literature tutor

4293 Views

A rollercoaster carriage wants to go up a slope of length 10m at an angle of 30 degrees above the horizontal, at what speed must the carriage be travelling at the bottom of the slope in order for it to reach the top? (Negligable Drag)

10m/s

Answered by Peter W. • Physics tutor

1676 Views

Describe how to find the concentration of an alkali using an acid of a known concentration.

Titrate the acid of known concentration against the alkali of unknown concentration to find the volume of acid needed to neutralise a known volume of the alkali. Remember to use an appropriate indicator a...

Answered by James K. • Chemistry tutor

3572 Views