What is a substance that by its presence increases the speed of a chemical reaction between other substances and yet is itself unchanged by the reaction?
a. accelerator
b. catalyst
c. inducement
d. reactor

Asolid that forms and separates from a liquid mixture is called

How many moles are contained in 5.6 l of h2 at stp

Choose all the answers that apply. fluorine (f) has an atomic number of 9 and an atomic weight of 18.99. fluorine has a. 9 protons b. 10 neutrons c. 18 electrons d. an atomic mass of 19 e. at least one isotope