1. balance the following redox equations by the ion-electron method: (25 points) a. h2o2 + fe+2 → fe+3 + h2o (in acidic solution) b. cu + hno3 → cu+2 + no + h2o (in acidic solution) c. cn– + mno4– → cno– + mno2 (in basic solution) d. br2 → bro3– + br– (in basic solution) e. s2o3–2 + i2 → i– + s4o62– (in acidic solution)

If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.

There are approximately 15 milliliters (ml) in 1 tablespoon (tbsp). what expression can be used to find the approximate number of milliliters in 3 tbsp?

Which of the following is a physical change? a.burning a piece of wood b.sawing a piece of wood in half c.rust forming on an iron fence d.a copper roof changing color from orange to green