Nitrogen (N) has an atomic number of 7 and an atomic mass of 14. Which of the following correctly shows the electron arrangement for nitrogen?

A. 2, 7

B. 2, 5

C. 2, 2, 3

D. 2, 8, 4

A student performs an experiment that produces solid sodium chloride. He uses four different catalysts and lets the reaction run for two minutes, and then removes the sodium chloride product.

Two formulas for compounds containing hydrogen and oxygen are H2O and H2O2. Do these formulas represent the same compound? Explain.

Which statement below about contrasting Hb and Mb is FALSE? A. Oxygen binds to a ferrous ion in both proteins. B. Hb shows cooperativity, whereas Mb does not. C. Hb binds O2 more tightly than Mb. D.

How many electrons in an atom could have these sets of quantum numbers?

93 mL of water has a given mass of 93 g. which object was more accurate in determining volume, the graduated cylinder or the beaker? why?

Nonmetal oxides can react with water to form acids. For example, carbon dioxide reacts with water to form carbonic acid: CO2 H2O H2CO3. (1) Write an equation to show how diiodine pentaoxide reacts with water to form an acid. Do not include states.

If atmospheric pressure suddenly changes from 1.00 atm to 0.892 atm at 298 k, how much oxygen will be released from 4.40 l of water in an unsealed container?

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.