Use the reactions given below to determine the ∆H^o rxn in kJ/mol rxn. ½ H2(g) + ½ I2(s) → HI(g) ∆H = 26 kJ/mol rxn
½ H2(g) + ½ I2(g) → HI(g)∆H = −5.0 kJ/mol rxn

Tin has ten stable isotopes. the heaviest, 124sn, makes up 5.80% of naturally occuring tin atoms. how many atoms of 124sn are present in 82.0 g of naturally occurring tin? what is the total mass of the 124sn atoms in this sample?

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3

Which statement best explains the relationship between an area is geography and the temperature of its surface water