If you have the same substances after a change, what type of change occurred?

Which of the following would be a PHYSICAL change that occurs when a candle is buring?

Type of chemical reaction that has 2 or more reactants and 2 or more products

Which of the following is true of a CLOSED SYSTEM

Which fo the following is true of an OPEN SYSTEM

20g of A + ____g of B ------ 60g of C What is the missing mass?

What 3 things are required for fire to burn?

If 300g of chemicals react and you measure only 200g of products, what type of system was probably used?

If the chemicals in a reaction start to feel cold, what type of reaction occurred?

What is a precipitate?

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