Which equation is balanced? Mg3N2 + H2O 3MgO + 2NH3
C3H8 + 5O2 H2O + 3CO2
Zn + 2HCl ZnCl2 + H2
3H2SO4 + 2Fe Fe2(SO4)3 + H2\

Mankiw attributes – chapter 1 and his 10 principles – differences in living standards within a countryover time and across countries at a moment in time to: a. the presence or absence of inflation and unemployment.b. the allocation of resources between private markets and the public sector.c. those that have dealt successfully with the efficiency v. equality tradeoff and those that haven’t.d. differences in productivity.e. ones that think at the margin and respond to incentives and those that don’t.