The area from which a river and its tributaries collect water is called the:
a.
rivertown
c.
water cycle
b.
drainage basin
d.
pull zone

Find the mass in grams of 1.37x1020 particles of h3po4

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?

Once similarity and one difference between a mixture of elements and a mixture of compounds