Three lab groups carried out an experiment to identify the concentration of sucrose in six solutions. each unknown contained one of the following sucrose concentrations: 0.0 m, 0.2 m, 0.4 m, 0.6 m, 0.8 m, and -1.0 m. cubes of sweet potato (1 cm3) were soaked for 24 hours in each solution and weighed to determine the change in mass. each data entry represents the average of three sample replicates expressed as percent change in mass following a 24-hour soak in the unknown solutions. from the data given, which statement most accurately describes what is occurring in response to a particular unknown solution?
unknown percent change in mass percent change in mass percent change in mass
group 1 group 2 group 3
a 6.6 7.8 7.5
b 3.1 3.7 2.9
c -2.7 -3.5 -2.5
d 0.7 0.5 1.1
e -11.6 -12.3 -12.6
f -5.2 -6.2 -4.9
a) unknown solution c represents a sucrose concentration slightly higher than the molarity of sweet potato cells, thus water is transported out of the cells.
b) osmosis of water molecules from unknown solution b likely caused the increase in mass observed.
c) unknown solution e contains the highest concentration of sucrose, and the change in mass is due to the active transport of sucrose out of the cell.
d) passive transport of sucrose out of the potato cells explains the change in mass observed for unknown solution f.

Is a measure of the resistance to flow. a high liquid has a high resistance to flow and flows slowly. the ancients thought everything in the world was made of 4 we now know that there are 94 naturally occurring and scientists have created another 24 i am certain they will create even more. honey flows slowly because it has a high to flowing. a can be separated by physical means because it contains more than one pure substance and 2 pure substances are not chemically bonded to each other. a cannot be separated by physical means. all matter is made up of all elements are with the same number of protons. if it is just a single or many bonded together, if all of them have the same number of protons, it is an element. in a piece of pure iron metal, all the are joined together, that piece of iron metal is called elemental iron. a single of iron is called elemental iron. a mixture has differences from place to place. we might need a microscope to see them or they might be obvious to the unaided eye. there are surfaces separating it into different phases. a mixture is the same everywhere. it is uniform. there are no surfaces separating it into different phases. if different kinds of atoms (different elements) are bonded together by their electrons, it is called a there are physical means of to isolate the different pure substances in a mixture and there are chemical means of to isolate the different elements in a compound. 1. element 2. compound 3. mixture 4. heterogeneous 5. homogeneous 6. pure substance 7. atoms 8. separation 9. viscosity 10. resistance