CHEMISTRY: (a) With the aid of an equation and a diagram, show how dinitrogen (i) oxide N20 may be prepared in the laboratory​

Compare and contrast physical changes with chemical changes.

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)

Which of the following has wavelength longer than the wavelength of viable light? a) x rays b) gamma rays c) radios waves d) ultraviolet waves