What is the percent yield of nh3 if the reaction of 26.3g of h2 produces 79.0g of nh3

Express the following number in scientific notation. 0.026890 =

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?

What is the empirical formula of a compound that is 50.7% antimony and 49.3% selenium ?