What do scientists call a substance that forms during a chemical reaction

A chemical reaction is a process in which one or more substances, also called reactants, are converted to one or more different substances, known as products.

where's the following? you gotta add it to know what the choices are

explanation:

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west