Chemical reactions can only occur when... 1)particles are able to separate
2) particles mix together
3) particles come together for a sufficient amount of time
4) particles come together with sufficient energy

Asample of rose gold is: 12.0 g gold, 5.0g silver, and 7.0 g copper. what is the percent copper in the sample?

During trial 2, what allowed you to determine that aluminum was the limiting reactant? check all that apply. all of the copper dissolved. all of the aluminum dissolved. the solution turned clear. the number of grams of copper(ii) chloride used in the reaction was greater than the number of grams of aluminum. the molar ratio of copper(ii) chloride to aluminum was greater than 3: 2, the equation’s molar ratio.

What is the mass defect of a mole of nuclei with 1.8 x 10^15 j/mol binding energy?