(giving brainlist) Which are features of the structure of a polymer? Select all that apply.

usually three atoms large.

always repeats the same unit

can be thousands of atoms large

made of smaller molecules

often made from repeating units

What are the spectator ions in 2h+ + so42- + ca2+ + 2r → caso4 + 2h+ + 21?

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)

In which situation can a mixture always be called a solution