Answer:
the correct answer is CO2 (the last one)
<span>A supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.</span>
A standardized test of what you want to do with your friends and you get to know what you think you want to be tre
Answer: A solution will be hypertonic to a cell if its solute concentration is higher than that inside the cell, and the solutes cannot cross the membrane. If a cell is placed in a hypotonic solution, there will be a net flow of water into the cell, and the cell will gain volume.
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Meaning of hypertonic: (1): having a higher osmotic pressure than a particular fluid, typically a body fluid or intracellular fluid. (2) of or in a state of abnormally high muscle tone.
Na is cation so it loses electron to be positive and become stable losing one valence shells one electron so it's oxidation number is +1 ie A is correct