How can you improve the percent yield of copper in this lab? check all possible strategies that will you do so.

ans)measure reactants precisely.

ans)stir to the reaction take place.

chill the reactants before combining them.

ans)wait patiently until the reaction completes.

ans)make sure to recover as much copper as possible.

Achemist determined by measurements that 0.0300 most of beryllium oxide participate in a chemical reaction calculate the mass of berlylium oxide that participates

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

If the density of water is 1.0 g/cm3, which of these materials would float in water, based on their densities? check all that apply. aluminum cork iron lead wax