Which of these is the best evidence that a chemical reactions occurs when coal burns? A-Coal is made up of more than one element
B-a new substance is produced
C-Oxygen is present
D-The shape of coal changes

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5

0.09 moles of sodium sulfate in 12 ml of solution

The diagram below shows a cell placed in a solution.a cell is shown placed inside a beaker. it is labeled cell. the solution inside the beaker is labeled 40% salt solution and the solution inside the cell is labeled 20% salt solution.only water is allowed to move in and out of the cell. what will most likely happen to the cell? it will expand as water moves out of it. it will shrink as water moves out of it.it will expand as water moves into it. it will shrink as water moves into it.