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
54012 Views

Explain the effect of increasing the temperature on the rate of reaction

As temperature increases more particles posses energy equal to or greater than activation energy. Due to that, particles collide more often increasing rate of reaction.
NJ
Answered by Natalia J. • Chemistry tutor
2320 Views

Why are noble gases so unreactive?

This is due to the number of electrons in the outer shell of their atoms. Their outer shell is full, meaning it is difficult for them to give or take electrons.
LD
Answered by Lara D. • Chemistry tutor
30022 Views

Why do skeletal formulae not show the hydrogens bonded to carbons but do on other elements?

Because carbon atoms have 4 electrons in their outer shell so always form 4 covalent bonds in a molecule, so the number of hydrogen atoms bonded can be inferred by subtracting however many bonds the carbon i...
MA
Answered by Megan A. • Chemistry tutor
2901 Views

Explain how successive ionization energies account for the existence of three main energy levels in the sodium atom.

Make the student observe and analyse the electronic configuration of sodium and the trends in ionization energies for this element. We note a large increase in ionization energy between the 1st and 2nd elect...
YT
Answered by Yasmin T. • Chemistry tutor
10391 Views