Which of the following is used in LPG cylinders a. petroleum gas
b. naphtha
c. diesel
d. petrol

What are scientists who study fossils called? ( a ) astronomers. ( b ) biologists. ( c ) geologists. ( d ) paleontologists.

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

Chemical engineering who specializes in negotiating for large purchases and instructing customers in use of the products are