Why isnt my grandma talking to me

What is the overall order of reaction for rate = k[no]2[o2]

Correct relationship between molecular formula and empirical formula

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.