What is the molecular formula (molar mass of 408 g/mole) if the empirical formula is SeF2

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!

Which one of the following bonds would you expect to be the most polar? a) b–h b) n–h c) p–h d) al–h e) c–h

Can someone me out on this question for my national 5 chemistry homework