7. what are the three challenges of life for a cell? *
(2 points)
o
obtain energy, reproduce, and maintain structure
o
reproduce, don't maintain structure, and obtain energy
o
don't reproduce, don't maintain structure, and obtain energy
o
obtain energy, reproduce, and don't maintain structure

Which solution is an example of a nonelectrolyte? a. iodine in hexane b. sodium nitrate in waterc. acetic acid in waterd. hydrogen chloride in water

Both josef loschmidt and amedeo avogadro contributed to our understanding of basic molecular numbers, sizes, and reaction ratios. neither scientist discovered “avogadro’s number” in the form we use it today (6.02 x 10 23). still, there’s a controversy over the name. research the contributions from these two scientists and read about how avogadro’s number got its name. briefly state what you think this number should be called, providing key details of each scientist’s contributions to this concept and a solid rationale for your case in naming the number.

Which of the following is true about the speed of light? it depends on the wavelength.