the average speed is 23.4 km per hour cause it is total distance over total time equal to average speed
I think you must do dot and cross diagrams but im not sure at all
<span>The righ answer is the option A. They are made up of two or more pure substances that are not chemically bonded. A classicall expample ot heterogeneous mixtures are sugar and salt. Sugar is a pure substance, salt is also a pure substance, when you mixe them you form mixture where salt is still salt and sugar is still sugar, that is what "they are not chemically bonded" means. So you can separate them by physical media. </span>
Answer:
Energy
Explanation:
Between gas to liquid, or liquid to gas, will give off extra energy to the surrounding environment
