In a certain​ chemical, the ratio of zinc to copper is 3 to 16. A jar of the chemical contains 608 grams of copper. How many grams of zinc does it​ contain?

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

Point r divides in the ratio 1 : 5. if the coordinates of e and f are (4, 8) and (11, 4), respectively, what are the coordinates of r to two decimal places?

Awavelength of 610 nm was found to be the most intense wavelength emitted by copper. answer the following questions about this wavelength of light. a) what is this wavelength in cm? b) what is the frequency that corresponds to this wavelength? c) what is the energy of light of this wavelength? d) what is the wavenumber corresponding to this wavelength?