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Chemistry, 22.06.2019 12:00
Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.
Answers: 2
Chemistry, 22.06.2019 13:30
The atomic number, or number, is the described as the number of in the nucleus of an chemical element.
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
Mathematics, 07.04.2020 21:47
Mathematics, 07.04.2020 21:47
Computers and Technology, 07.04.2020 21:47
Physics, 07.04.2020 21:47
Computers and Technology, 07.04.2020 21:47
Computers and Technology, 07.04.2020 21:48
Mathematics, 07.04.2020 21:48
Mathematics, 07.04.2020 21:48
Mathematics, 07.04.2020 21:48