Are there other universes?

A solution of naoh (aq) contains 11.6 grams of naoh in 129 ml of solution. calculate the ph at 25◦c.

If a reaction has an equilibrium constant slightly greater than 1, what type of reaction is it?

There are 50 billion gold atoms in every drop of sea water. 1 drop =.05ml. is it feasible to "mine" the ocean for gold? in other words, how many gallons of sea water would have to be stripped of its gold to produce 1 troy ounce of the precious metal?

How many milliliters of 0.50 M KOH are needed to exactly neutralize 10 milliliters of of 1.5 M HNO3 A. 5.0 mL B. 12 mL C. 25 mL D. 30 mL

You have a balance that can measure mass to the nearest gram. Which measurement is written with the correct amount of precision? A. 0.1 g B. 11 g C. 11.1 g D. 11.12 g

Determine the molecular formula for the unknown if the molecular mass is 60.0 amu and the empirical formula is ch2o.

Draw the organic product of the following nucleophilic reaction

How does the energy of the activated complex compare with the energies of reactants and products? select one: a. it is lower than the energy of both reactants and products. b.

A student asked to convert measurements from liters to mililiters and from mililiters to liters. His answers are shown in bold in the choices shown below. On which choice did he make a mistake?

Donald is making a model of a nitrogen atom. The box for nitrogen in the periodic table is shown. To represent a neutral atom, which of these must Donald include in his model?