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Calculate: (a) The amount, in mol, of white phosphorus used, (b) the limiting reagent, (c) the excess amount, in mol, of the other reagent.

P₄(s) + 3OH^-(aq) + 3H₂O(l) ---> PH₃(g) + 3H₂PO₂^-(aq)
Provided for answering (a): Mass of white phosphorus: 2...

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Why does the atomic radius of an atom decrease as you go across a period?

The atomic radius is often defined as being one half the distance between the two nuclei in a homonucleur diatomic molecule. In general, there is a decrease in atomic radius as you go across a period. Thi...

Answered by Louise E. • Chemistry tutor

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How is the bonding in NH3 and what does this entail for its electron-domain geometry and molecular geometry?

Nitrogen has atomic number 7; so, when neutral, it has 7 electrons . Those electrons are organized according to the Aufbau principle in an electronic configuration of 1s² 2s² 2p^...

Answered by Francisco T. • Chemistry tutor

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What is the VSEPR theory?

(The answer really depends on the level of the student, hence more or less explanation might be needed.)The VSEPR (Valence Shell Electron Pair Repulsion) theory is used within chemistry to predict the geo...

Answered by Alena K. • Chemistry tutor

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