I need help with Chemistry please it’s phase changes

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

What is the mass of 2.00 l of an intravenous glucose solution with a density of 1.15 g/ml?

As we move from left to right across the periodic table, what is the general trend? a) atomic radii increase. b) electronegavitiy decreases. c) nuclear shielding increases. d) metallic character decreases.