how do you know that a chemical has happened? A: A substance is mixed with water and forms a solution. B: The substance increases in temperature. C: The substance changes its state. D:A new substance forms. *It didn't say science so I put it as chemistry but its science sorry​

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)

Asap! will give brainiest when a heat wave strikes a region causing more people to run air-conditioning units, electrical demand increases. what needs to be done to meet this increased demand? raising the control rodslowering the control rodsremoving the control rods

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17