Explain how two compounds can have the same percentage composition but different molecular masses?

Ergosterol, a precursor of vitamin D, has δmax = 282 nm and molar absorptivity ε = 11,900 M-1cm-1. What is the concentration of ergosterol in a solution whose absorbance A = 0.43 with a sample pathlength l = 1.00 cm.?

What are polymers? 1.) long chains of carbon molecules 2.) long chains of halogen molecules 3.) small groups of halogen molecules 4.) small groups of carbon molecules

Select the true statement about oxidation and reduction in an electrolytic cell. A) Both oxidation and reduction occur at the anode. B) Both oxidation and reduction occur at the cathode.

When designing an experimental investigation, why is it important to test only one variable?

How to figure out if a reaction is exothermic or endothermic?

Identify the strongest attractive force present in the pure substances shown: london forces, dipole-dipole, hydrogen bonding, ion-dipole, or ionic attractions.

How is electronegativity used in determining the ionic or covalent character of the bonding between two elements?

Which set of characteristics would you use to classify this planet as an inner or terrestrial planet?

If you add acid or base to water how will the ph change

If a house viewed through infrared goggles, where would the most seen Answers A. In the basement B. Along a wall C. On the wall D. Near the roof