Ineed with questions 16-21 and it’s very hard and i’m struggling with it and if you need to see the picture big then click on it and it will be big

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

Clyde and marilyn are riding a roller coaster. during which section(s) of the track is their potential energy converted to kinetic energy? a. from point b to point c only b. from point b to point d only c. from point a to point b only d. from point a to point b and from point c to point d

Which element is least likely to undergo a chemical reaction