100.0 ml of a 0.50 m aqueous nh3 solution is mixed with 200.0 ml of 0.25 m aqueous hi. at 25 ºc the mixture will have a ph of

Can someone me with 3 and 4 plz. this is for masteries test.

If e is the symbol for an element, which two of the following symbols represent isotopes of the same element? 1. e2. e3. ea.1 and 2c.1 and 4b.3 and 4d.2 and 3

Which polymers are most closely related? a. protein and nucleic acids b. cellulose and starch c. nucleic acids and starch d. nucleic acids and cellulose