Asample of a liquid solvent has a density of 0.815 g/ml. what is the mass of 115.5 of the liquid?

If 1.63 times 10 negative 4 of helium dissolves in 100.0g of water, what is the concentration in parts per million

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

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.