If the oxidation number of nitrogen in a certain molecule changes from + 3 to - 2 during a reaction, is the nitrogen oxidized or reduced? how many electrons are gained or lost by the nitrogen atom?

Which property is true for metals? A. localized electrons B. high electronegativity C. low ionization energies D. tightly held valence electrons

Electrically neutral atoms of the same element must A. contain the same number of neutrons B. have the same mass number C. contain the same number of protons D. have equal numbers of protons and neutrons

On a shade-grown coffee plantation, smaller coffee plants grow in the shade of forest trees. The practice produces fewer coffee beans than growing coffee in full sun, but it is more sustainable because it provides habitat for forest birds.

Which of the following orbitals is the largest in size? A. 2s B. 4s C. 1s D. 3s E. all s orbitals are the same size

How is a mole ratio used in stoichiometry?

True or False: According to the present atomic theory, the location of an electron in an atom is best represented by a probability cloud.

How can we measure the density of different wooden objects

According to molecular orbital theory, all diatomic molecules with an even number of electrons will be diamagnetic. True or False?

Which of the following equilibria would be impacted by a change in pressure? Select the correct answer below: H2 (g) + I2 (g) →2HI (g) NO (g) + O3 (g) →NO2 (g) + O2 (g) 2SO3 (g) →2SO2 (g) + O2 (g) CO (g) + H2O (g) →CO2 (g) + H2

A common stain remover is sold in concentrated form as 3M sodium hypochlorite (NaOCl). You need to create 400 milliliters of a 0.5M solution of sodium hypochlorite to fill a spray bottle. What volume of 3M sodium hypochlorite is needed? 15.0 mL 66.