What is the structural formula for sf6

If 3.00 g of titanium metal is reacted with 6.00 g of chlorine gas, cl2, to form 7.7 g of titanium (iv) chloride in a combination reaction, what is the percent yield of the product?

Which compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )