What are close-toed shoes least likely to provide protection against?

What is the temperature of one mole of helium gas at stp?

How many moles of carbon dioxide will form if 2.5 moles of c3h8 is burned

The activation energy for the reaction no2(g)+co2(g)⟶no(g)+co(g) is ea = 300 kj/mol and the change in enthalpy for the reaction is δh = -100 kj/mol . what is the activation energy for the reverse reaction?