A pure copper cube has an edge length of 1.10cm. How many copper atoms does it contain?

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.

Amatch has about 21 milligrams of red phosphorus coating the tip. how many atoms of phosphorus is this?

Why is it important for scientists to replicate each other’s experiments? to determine if important scientific results are repeatable to the research of other scientists to determine if slight alterations in the experiment can affect the result to further their own research