Chemistry, 02.01.2020 15:31, jgnjanjdknsjrr9358
Pure sodium metal explodes when it makes contact with water. in its natural state, chlorine is a deadly, poisonous gas. when these two chemicals combine, they form a harmless, white powder known as sodium chloride or table salt. which of the following statements does this information support? a. the properties of substances change during chemical reactions but then later go back to their original condition. b. heat must be added in order to change the chemical properties of substances. c. when substances are chemically combined, the properties of the new substances that are formed are often different from the properties of the original substances. d. when substances are chemically combined, the properties of the new substances that are formed are the same as the properties of the original substances.
i think it's d but i'm not sure
Answers: 2
Chemistry, 22.06.2019 00:00, lilyclairehutson
Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.
Answers: 1
Chemistry, 22.06.2019 00:30, mannster03
This active feature of earth's crust in building mountain ranges as well as islands. this feature is a a) cavern. b) earthquake. c) mountain. d) volcano.
Answers: 2
Chemistry, 22.06.2019 20:00, kalcius9698
What is the molarity of the solution produced when 145 g of nacl is dissolved in sufficient water to prepare 2.75 l of solution?
Answers: 1
Pure sodium metal explodes when it makes contact with water. in its natural state, chlorine is a dea...