Compare and contrast the properties of acid and base compounds.

Help please

How can you improve the percent yield of copper in this lab? check all possible strategies that will you do so. measure reactants precisely. stir to the reaction take place. chill the reactants before combining them. wait patiently until the reaction completes. make sure to recover as much copper as possible.

When and why was the metric system invented?

Look at the diagram of the food web. the arrows mean “eaten by.” what will happen if the number of snakes goes down?