Which chemical formula represents the hydroxide ion?

What are the spectator ions in 2h+ + so42- + ca2+ + 2r → caso4 + 2h+ + 21?

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

Use the drop-down menus to answer each question. which runner finished the 100 m race in the least amount of time? which runner stopped running for a few seconds during the race? at what distance did anastasia overtake chloe in the race?