I have a chemistry question but I suck at chemistry. Could someone explain to me this question: 'Iron Bromide is ionic. What is the charge on the bromide ion?'

For a patient with the following pes statement and interventions, which would be the most appropriate monitoring and evaluating data? pes statement: inadequate calcium intake related to food and nutrition related knowledge deficit as evidenced by statements that the only dietary source of calcium is milk and she believes that she is lactose intolerant. patient’s nutrition prescription is for a diet providing 1200 mg calcium per day. patient was provided with in-depth nutrition education on alternative dietary and supplement sources of calcium. a. calcium intake (at subsequent visit) b. knowledge assessment by asking patient to identify food sources from menus and shopping list (at the end of the current visit) c. serum calcium (at next visit) d. both a and b e. both a and c

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

Why doesn't heat added to water make the tempature rise above 100c