A student does not observe a change when holding a test tube in a flame. However, a change is expected. What is the most likely reason for this?
In the image to the right, a student is completing an experiment. What should the student do in order to follow the safety guidelines for this lab? Check all that apply.
Enter the numbers 1 to 5 to put in order the steps for lighting a Bunsen burner. Use a strike lighter to light the flame. Turn on the gas supply to the Bunsen burner. Clear the area of anything flammable, such as liquids, hair, etc. Adjust the air flow to control the size of the flame. Close the air supply on the Bunsen burner.
no✔ yes
The reactant CuSO4 is an element✔ an ionic compounda moleculean oxide.
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The insoluble yellow solid is PbI2, which is X lead iodine✔ lead iodideantimony iodideantimony iodine.
single replacement✔ double replacementcombustion (and synthesis)synthesisdecomposition
One product is lead iodide. The other product is X lead oxidepotassium oxide✔ potassium nitratenitrogen oxide.
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