Question

What formula represents lead(II) chromate?

Answer 1

Lead chromate is an inorganic compound which is of yellow color and this is soluble in almost all solvents. There are two polymorphs of lead chromate which are named as orthorhombic and monoclinic.

Complete answer:
At the earliest stage chemical formulas are obtained of any molecule by determining the masses of all the elements that are combined to form a molecule after that two important types of formulas in chemistry come which are known as molecular formula and empirical formula.
The molecular formula is defined as the formula derived from molecules and is representative of the total number of individual atoms present in a molecule of a compound. A molecular formula generally uses a subscript which reports the actual number of each type of atom in a molecule of the compound. Molecular formulas are also associated with gram molecular masses which are simple whole number multiples by the corresponding empirical formula mass where empirical formula of a compound gives the simplest ratio of the number of different atoms present, whereas the molecular formula gives the actual number of each different atom present in a molecule. If the formula is simplified then it is an empirical formula.
Molecular formula of lead(II) chromate is $PbS{{O}_{4}}$ which represents lead and sulfate ion is present where lead have +2 charge on it while sulfate have -2 charge on it and overall molecule remains constant.
Hence $PbS{{O}_{4}}$represents lead(II) chromate

Note:
The empirical formula can also be known by the name simplest formula and can be defined as the simplest formula of a compound which is defined as the ratio of subscripts of the smallest possible whole number of the elements present in the formula.