The following reaction is an example of an _______ reaction. 2N2(g) + O2(g) → 2N2O(g)   ΔHrxn =  +163.2 kJ

A solution that has = 6.7×10-10 M is:

The signs of q and w for an exothermic reaction are _______, respectively.

Consider the reaction below:                Fe + Br2 → FeBr2    If 44.2 g of iron reacts with an excess of bromine gas, what mass of FeBr2 can form?  (Hint: FeBr2 = 215.65 g/mol)

From the balanced equation, Zn + S → ZnS, a chemist calculates that 6.41 g of zinc sulfide should be obtained. However, the chemist isolates only 5.01 g of product. What is her percent yield for this reaction?

What is the mass of 1.6×1021 argon atoms?

Which of the chemical pairs below CANNOT produce a Brønsted–Lowry acid/base reaction between them?

The name given to an aqueous solution of HNO3 is:

A small ice cream sundae contains 550 kcal of stored chemical energy.  What is this energy in kJ?

Which of the following is/are involved in translation in bacteria?