An oxide of arsenic contains 3.26 g of arsenic and 1.04 g of oxygen. What is the empirical formula for this oxide?

The empirical formula for this oxide : As₂O₃

Further explanation:

Given

mass of Arsenic=3.26 g

mass of Oxygen = 1.04 g

Required

The empirical formula

Analysis

Solution

mol of Arsenic(MW=74,9216 u) :

mol of Oxygen(MW=15.999 u) :

.

The ratio for each element (divide by smaller mol⇒Arsenic)

Arsenic : Oxygen :

The empirical formula : As₂O₃

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