Dalton's theory of atoms said that the masses of elements in a compound are always?

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false

Two nails have identical sizes and shapes. in one nail, 20 percent of the domains are lined up. in the other nail, 80 percent of the domains are lined up. which has stronger magnetic force? first answer gets brainliest!