Four moles of carbon dioxide and two moles of oxygen are mixed in a container. If the total pressure is 320 kPa, the pressure due to oxygen would be (Answer) kPa (3 SF).

Which is true of chemicals? a. things containing chemicals always cost a lot of money. b. chemicals are never dangerous. c. chemicals are in many substances in a home. d. chemicals are rarely found on earth.

One similarity and one difference between an element and a mixture of elements

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