If you were choosing indicators for the hydrochloric acid and acetic acid titrations, at what ph would you want a sharp color change

Which of the following elements would you expect to have the lowest ionization energy value? fluorine, lithium, neon, nitrogen

The peak wavelength for the blackbody curve of a star is in the uv range. assuming the radiation from this star can reach earth, would you be able to see it?

Tin has ten stable isotopes. the heaviest, 124sn, makes up 5.80% of naturally occuring tin atoms. how many atoms of 124sn are present in 82.0 g of naturally occurring tin? what is the total mass of the 124sn atoms in this sample?