Which of the possible examples below would most likely lead to a change in the cell theory? Scientists find life on Mars that is not made of cells.

Scientists identify a cell organelle that practices the process of photosynthesis.

Scientists determine that an organism is living if it is made of twenty structurally-identical cells.

Scientists gather life from a volcano that is composed of cells which are very different from humans.

Can someone me with questions 15 to 17 plz.

How do dying stars contribute to the formation of planets

Cryolite, na3alf6(s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. start this question by first balance the chemical equation.1.) balance the equation: - alo3(s)+naoh(l)+hf(> na3alf6+h2o(g). 2.) if 17.5 kilograms of al2o3(s), 51.4 kilograms of naoh(l), and 51.4 kilograms of hf(g) react completely, how many kilograms of cryolite will be produced? 3.)which reactants will be in excess, (al2o3, naoh, or hf) 4.)what is the total mass of the excess reactants left over after the reaction is complete in kg?