Which property can be altered by a physical change? A. composition
B. melting point
C. appearance
D. density

Which compound contain an iron with a 3+ charge

Consider the reaction: n2(g) + o2(g) ⇄ 2no(g) kc = 0.10 at 2000oc starting with initial concentrations of 0.040 mol/l of n2 and 0.040 mol/l of o2, calculate the equilibrium concentration of no in mol/l how would this be done?

How does the viscosity of magma change as magma cools?