In the reaction mechanism the compound MnO2 appears. A student makes the claim grams of "The order of MnO2 must be zero since it does not appear in the overall balanced equation." Do you agree or disagree with the student? Explain your reasoning.

After watching the video "zinc strip in copper nitrate solution", and reading the instructions, click on the link labeled "start" just below the drawing of the pencil tip. follow the direction to complete the 3x3 grid. answer the below questions for the portion of the activity in which sn(s) is placed in agno3(aq)

Drug abuse will not lead to physical and psychological dependence. true or false ?

Jose and eric were given four samples in lab. the results of their analysis are shown in the table. based on the data they collected, which sample is most likely a metal?