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What changes in physical properties can be used as evidence that a chemical reaction has occured?

What is the charge on oxygen (O) when it forms an ion? 1+ 1- 2+ 2-

Ionic bonds form between two negatively charged particles true or false

Define mechanical energy. Using the example of the pendulum, explain how kinetic and potential energy relate to the mechanical energy at different positions.

90) Garrett has just purchased a beer distributorship. He wants to increase the Visibility of his firm inlocal markets, but he knows there are a number of regulations and socially accepted practicesassociated with promoting alcoholic beverages.

Which is the MOST accurate description about how the different types of feedback mechanisms work

What was one of the main benefits to the use of the icebox for cooling food?

How many moles of chlorine gas would occupy a volume of 35.5 L at a pressure of 0.98 atm and a temperature of 373 K?

What are the building blocks

If the specific heat of copper is 0.711 J/g•°C, how much copper would it take if the heat given off is 54.85 calories and the temperature change is 205°C.