Plz help! Which of the following steps can be used to identify a double replacement reaction?

Check whether the products are salt and water.
Check whether the reactants are an acid and a base.
Check if the ions of two compounds exchange places.
Check if one element replaces another element in a compound.

If the same amount of cacl2 is added to equal volumes of water and maple syrup, which will have the higher temperature?

Which of the following is not a good technique for managing used oil? a) have specific, labeled catch pans available for technicians who are collecting oil b) spills in your shop and any releases on pavement or outside should be poured down a drain c) do not use oil containers for antifreeze or other non-similar fluids d) be prepared for oil spills with the proper absorbents

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?