Top answers

What is the oxidation number of Mn in K2MnO4?

The oxidation number of an ion is the same as its charge. We know that the oxidation number of K+ is +1 and the oxidation number of O2- is -2, but we don't know the oxidation number of Mn so let's call that ...
AC
Answered by Alex C. • Chemistry tutor
54056 Views

An acid can be either strong or weak, explain the difference between strong and weak acids.

The strength of an acid refers to the level of which it dissociates in an aqueous solution. Dissociation is a process in which molecules can split into smaller ones, atoms or ions. In the case of an acid, th...
IM
Answered by Iona M. • Chemistry tutor
7506 Views

Explain the bonding and thus the properties of a carbon allotrope

Diamond- Each carbon atom is bonded to four other carbon atoms with strong covalent bonds in a tetrahedral structure (with bond angles of 104.9 degrees). As all four valence electrons are used for bonding, n...
TD
2552 Views

24.5g of CH3CH2CH2Br was reacted with ammonia to form CH3CH2CH2NH2 at a 75.0% yield, calculate the mass of the product formed.

The first step is to calculate the moles of the reactant CH 3 CH 2 CH 2 Br. To do this you need the formula:moles = m/Mr where m is the mass in grams and Mr is the molar mass which can be worked out using th...
MC
Answered by Matthew C. • Chemistry tutor
6415 Views

A sample of CaCO3 has been weighed in at 6.3 g. How many moles of calcium carbonate are present?

The first thing to think of here is what does a mole actually mean?Using the equation: Moles = Mass (g) / Molar Mass we can first find out what the molar mass of CaCO 3 is.TO THE PERIODIC TABLE!1) List the i...
TC
Answered by Thomas C. • Chemistry tutor
16876 Views