Which two elements are ions?

a) Π and Ψ
b) Φ and Ψ
c) Σ and Ω
d) Ψ and Ω

100mg magnesium reacts with 20ml of 1.0m hcl

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.

If blood contains 150g of hemoglobin per liter of blood, how much hemoglobin would be contained in 10 ml of blood