25 points each! A molecular chain of C and H atoms has the formula C20H42, has moderate viscosity, and is not soluble in water. Make two modifications to the chemical structure to achieve different physical properties. Discuss the new atoms/bonds would be present in the molecule after the change.

The first change should increase the viscosity while leaving the molecule insoluble in water.

The second change should further increase the viscosity of the substance while increasing its solubility 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.

All motion is caused by force? true or false

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false