The formula of pentaphosphorus tetraoxide is P₅O₄
As per the convention of naming chemical compounds - the Prefix names are used for naming covalent compounds.
The prefix 'penta' means '5', so we use 5 as subscript for P.
The prefix 'tetra' means '4', so we use 4 as subscript for O.
Therefore the formula of pentaphosphorus tetraoxide is P₅O₄
Can you post the question
Calcium hydroxide react with hydrogen chloride to produce calcium chloride and water (CaCl2 + 2H2O)
Answer:
Solvent is 1.00 liter of water.
The moles of magnesium in 1.25 x 1023 are 20.8 mol.