A student dilutes an aliquot of 15.0 mL of 1.0 M HCl and makes a solution with a total volume of 100. mL. How much water was required to make this dilution?
100. mL
85.0 mL
60.0 mL
15.0 mL

Why do scientists look for patterns in the world? a. patterns can explain observations. b. patterns never change, no matter what. c. patterns are easy for scientists to detect. d. patterns are all the same, through all time.

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.

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.