Chemistry

Chemistry, 22.09.2019 18:30, edfrank6278

Name the four signs of a chemical change.

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Chemistry, 28.10.2019 23:31, JosefineRubino2204

With all 1. check all the statements that are correct. conservation of mass means: 1.matter can be destroyed in a chemical reaction 2.we can start a reaction with different types of elements than we have at the end of the reaction. 3.we must start and end with the same amounts of matter 4.matter cannot be created question 2 select all of the signs of a chemical reaction 1.a solid is formed 2.the change can be easily undone 3.the state of matter changes 4.a gas is released 5.a temperature change happens 6.a color change happens question 3 a chemical 1.creates one or more new substances 2.happens in the water cycle 3.is only a physical change 4.is when something changes the state of matter question 4 changing from one state of matter to another is a 1.physical change 2.chemical reaction 3.chemical change 4.optical illusion question 5 during a chemical 1.the substances change by rearranging the atoms and elements 2.matter can be destroyed 3.new matter is created 4.energy is created !

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