Which of the following is a sign a chemical reaction has occurred?
Options
A) A blue liquid...
Chemistry, 19.08.2020 18:01 willijav000
Which of the following is a sign a chemical reaction has occurred?
Options
A) A blue liquid is mixed into a yellow liquid, and the mixture turns green.
B) A piece of metal is placed in water and produces sparks and gas.
C) A liquid is heated in a hot plate, and bubbles form.
D) A solid powder is mixed into a liquid and disappears
Answers: 3
Chemistry, 21.06.2019 16:00
Silica, sio2, is formed on silicon as an electrically insulating layer for microelectronic devices. silica is formed when silicon is exposed to o2 gas at an elevated temperature. at 900˚c, it takes 90 minutes for the oxygen to diffuse from the surface to form a 0.06 micron (0.06 x 10-6 m) thick layer of sio2 on
Answers: 1
Chemistry, 21.06.2019 22:30
Explain why scientists use shared characteristics to make cladograms.
Answers: 1
Chemistry, 22.06.2019 19:10
Which statement correctly describes the phosphate ion, ? it is composed of one phosphorus atom and four oxygen atoms covalently bonded together, and there is a –3 charge distributed over the entire ion. it is composed of one phosphorus atom and four oxygen atoms covalently bonded together, and there is a –3 charge on the phosphorus atom. it is composed of one phosphorus atom and four oxygen atoms ionically bonded together, and there is a –3 charge distributed over the entire ion. it is composed of one phosphorus atom and four oxygen atoms ionically bonded together, and there is a –3 charge on the phosphorus atom.
Answers: 3