Chemistry, 01.09.2020 19:01 drippyc334
Massive stars fuse hydrogen, then helium, and finally develop carbon-oxygen cores. At about 1 billion K, they are able to ignite carbon, then oxygen, neon and magnesium fuse to make silicon, and finally iron. Because more and more protons are used up to make heavier atoms, we could expect
Answers: 1
Chemistry, 21.06.2019 13:00
What is the h+ concentration for an aqueous solution with poh = 4.01 at 25 āc? express your answer to two significant figures and include the appropriate units.
Answers: 1
Chemistry, 22.06.2019 01:30
Aroller coaster car is traveling down a track at 22 m/s. the car has a mass of 2000 kg. what is the kinetic energy of the car? a) 22,000 j b) 968,000 j c) 484,000 j d) 44,000 j
Answers: 2
Chemistry, 22.06.2019 12:30
Place the elements below in order of decreasing ionization energy. aluminum(al) chlorine(cl) magnesium (mg) sulfur(s)
Answers: 1
Chemistry, 22.06.2019 23:00
What is a substance? a. a physical property of matter b. a chemical property of matter c. an element or compound that cannot be physically separated d. characteristics used to tell the difference between mixtures
Answers: 1
Massive stars fuse hydrogen, then helium, and finally develop carbon-oxygen cores. At about 1 billio...
Biology, 09.07.2019 11:30
Physics, 09.07.2019 11:30
Mathematics, 09.07.2019 11:30
History, 09.07.2019 11:30
Biology, 09.07.2019 11:30
Physics, 09.07.2019 11:30
Geography, 09.07.2019 11:30
Mathematics, 09.07.2019 11:30
Health, 09.07.2019 11:30
Mathematics, 09.07.2019 11:30