Final answer:
To determine the empirical formula for the compound with given masses of Ba and Br, convert the masses to moles and find the ratio of the moles. In this case, the empirical formula is BaBr2.
Step-by-step explanation:
To calculate the empirical formula for each compound, we need to determine the ratio of the elements in the compound using their masses.
Given the masses of Ba and Br, we can convert them to moles using their respective molar masses.
The molar mass of Ba is 137.33 g/mol, and the molar mass of Br is 79.90 g/mol.
Using these values, we find that there are 0.0195 moles of Ba and 0.0390 moles of Br in the given sample.
To find the empirical formula, we need to divide the moles of each element by the smallest number of moles obtained. In this case, the smallest number of moles is 0.0195.
Dividing the moles of Ba and Br by 0.0195 gives us approximately 1 mole of Ba and 2 moles of Br.
Therefore, the empirical formula for the compound is BaBr2.