A student is given a solution containing 0.932 g of an unknown acid, H2A(aq) To determine the molar mass of the acid, the student titrates the sample using a 0.481 M solution of KOH(aq). 1. Write the balanced equation for the reaction taking place. Include states of matter.

2. If 28.9 mL of KOH is required to consume the acid completely, calculate the moles of H2A.

3. Calculate the molar mass of H2A.

Aside from human impact, which of the following causes less water vapor production over a small area? (2 pderivartin

Two nitro no2 groups are chemically bonded to a patch of surface. they can't move to another location on the surface, but they can rotate (see sketch at right). it turns out that the amount of rotational kinetic energy each no2 group can have is required to be a multiple of ε, where =ε×1.010−24 j. in other words, each no2 group could have ε of rotational kinetic energy, or 2ε, or 3ε, and so forth — but it cannot have just any old amount of rotational kinetic energy. suppose the total rotational kinetic energy in this system is initially known to be 32ε. then, some heat is removed from the system, and the total rotational kinetic energy falls to 18ε. calculate the change in entropy. round your answer to 3 significant digits, and be sure it has the correct unit symbol.

What is the formula for the compound dinitrogen pentoxide? a. n4o5 b. n5o4 c. n4o6 d. n5o2 e. n2o5