Is the following reaction an SN1 or SN2 reaction ?

What is a scientific theory? a. a scientist's guess about how something works b. the results of an experiment obtained using the scientific method c. a proven fact that will never change d. an idea that is backed by data from many sources

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins

What is the mass of 0.46 mol of mgcl2