Chemistry

Chemistry, 07.07.2019 00:00, sarahhN7534

Is turning the lights on a physical or chemical change? explain why?

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Chemistry, 24.06.2019 17:00, MysteryDove12

What is the difference between a physical change and a chemical change? (2 points) a physical change is only a phase change but a chemical change can be any type of change. a physical change does not change the identity of the substance but the chemical change does. a physical change breaks and forms bonds but a chemical change does not change the bonds. a physical change only changes the color but a chemical change never changes the color.

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Chemistry, 07.07.2019 00:00, zalayjahan4793

Is turning the lights off a physical or a chemical change? explain why?

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Chemistry, 21.07.2019 06:00, kodaxmodz

While studying chemical and physical changes, students added salt to a glass of water. they stirred the salt until it dissolved and could no longer be seen. "that's a chemical change," sarah stated. do you agree? explain. a) yes, it is a chemical change because something new is formed. b) no, it is a physical change. it is salt and water and you can get the salt back by boiling off the water. c) yes, it is a chemical change because there was a change in the appearance of one of the components, the salt. d) no, it is a physical change. a chemical change cannot occur when you mix two compounds together like salt, nacl, and water, h2o, without adding heat.

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Chemistry, 20.09.2019 19:30, nathrontheking

When you blow dry your hair physical or chemical change? and briefly explain why you forgot to dry the bread knife when you washed it and reddish brown spots appeared on it physical or chemical change? and briefly explain why you decide to toast a piece of bread but leave it in the toaster too long. the bread is black and the kitchen is full of smoke. physical or chemical change? and briefly explain why baking powder reacts to release carbon dioxide bubbles. the carbon dioxide bubble cause the dough to rise. physical or chemical change? and briefly explain why you take out your best silver spoons and notice they are very dull and have some black spots. physical or chemical change? and briefly explain why in a fireworks show the fireworks explode giving off heat and light. physical or chemical change? and briefly explain why

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