What is the ability to react with air

When fat comes in contact with sodium hydroxide, it produces soap and glycerin. determine whether this is a physical change or a chemical change. explain your answer

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest

Which is special about a dc circuit ? a. it has both series and parallel components b. it has only series or only parallel components c. charge moves in a single direction d. charge moves back and forth quickly