A sample of an iron oxide weighing 0.982 g is found to contain 0.763 g of iron. The rest of the mass is oxygen. Determine the empirical formula of the compound.

List the path of the respiratory system

Which statement explains why the bonds between non metals tend to be covalent? the bonds are found to be nondirectional they have large differences in electronegativity they have small differences in electronegativity they have ions that produce an electrostatic pull

When a device is used in a circuit in which the voltage is 81 v the current flowing through the device is 3 a what is the resistance of the device