A sample of a compound contains #"0.672 g Co"#, #"0.569 g As"#, and #"0.486 g O"#. What is its empirical formula?
2 Answers
The empirical formula is
Explanation:
First we have to calculate the ratio of the weight of each element to its atomic weight.
After calculating the ratio, find lowest value for the element, i.e.
Divide this number into all the values above.
Since the ratio for
The empirical formula is
Explanation:
Molar mass of each element (atomic weight in grams/mole)
Determine the number of moles of each element using the given mass and the molar mass.
Moles Ratios and Empirical Formula
Determine the mole ratios by dividing the number of moles of each element by the least number of moles.
An empirical formula is the lowest whole number ratio of elements in the compound. Problem: the mole ratio of Co is 1.5, which is not a whole number. In this case you multiply each ratio times 2.
The empirical formula is