The equation 2no2 < > n2o4 shows a system
a: in chemical equilibrium
b: in physical equilibrium
c: that does not reach equilibrium
d: that does not change

If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.

Consider the elements bromine and chlorine; which elements has a larger ionic radius ?

Calculate - analysis of compound composed of iron and oxygen yields 174.86 of fe and 75.14g of o. what is the empirical formula for this compound?