A 65.00 mL solution of 0.4950 M AgNO3 was added to a solution of AsO3−4 . Ag3AsO4 precipitated and was filtered off. Fe3+ was added and the solution was titrated with 0.2150 M KSCN . After 38.00 mL of KSCN solution was added, the solution turned red. What mass of AsO3−4 was in the original solution? I know i need to find the original conc of Ag^+ and minus the original from the final to get the final mass

Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? a. magnesium has a 2- oxidation number and chlorine has a 1+ oxidation number. b. magnesium has a 2- oxidation number and chlorine has a 2+ oxidation number. c. magnesium has a 2+ oxidation number and chlorine has a 1- oxidation number. d. magnesium has a 1+ oxidation number and chlorine has a 1- oxidation number.

How hot is the suns corona? (integrated science)

Which of the following is most likely true about water in chemical systems? a) water dissolves nonpolar ionic compounds. b) water dissociates ionic compounds. c) water dissociates covalent molecules. d) water dissolves nonpolar covalent substances.