31). Which element is most likely to form three covalent bonds? B) Si C) P D) S

Question

31). Which element is most likely to form three covalent bonds? B) Si C) P D) S E) Se 32). Which statement regarding balanced chemical equations is not true? A) The number of each kind of atom must be the same on each side. B) Coefficients are used in front of formulas to balance the equation. C) Subscripts may be changed to make an equation simpler to balance. D) When no coefficient is written in front of a formula, the number "one" is assumed. E) Reactants are written to the left of the arrow. 33). Interpret in words the equation shown. P4010(s) + 6 H2O(l) 4 H3PO4(aq) A) One mole of solid tetraphosphorus decaoxide reacts with six moles f liquid water to produce four moles o phosphoric acid solution. B) Zero moles of solid phosphoric oxide dissolve in six moles of water to produce four moles of phosphorous C) One mole of phosphorus(x) oxide combines with six moles of water to produce four moles of solution of hydrogen phosphate. D) Four m to produce four moles of phosphoric acid in solution. E) Four atoms of phosphorus, 16 atoms of oxygen, and 12 atoms of hydrogen rearrange to produce four mole of phosphoric acid. oles of solid phosphorus, five moles of diatomic oxygen gas, and six moles of liquid water react to

Explanation / Answer

1) the element most likely to form 3 covalent bond is phosphorus(P) because it require 3 more electron to have a stable octet .   

2) the statement 3 is incorrect as it says , subscript may be changed to make the equation easy to balance .

3)accordind to the equation one mole of solid tetra phosphorus decaoxide combines with 6 moles of liquid water to give four mole of phosphoric acid solution .

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