An atom of sodium has an atomic mass of 23 and an atomic number of 11. The atom contains

Chemical equilibrium between gaseous reactants and products is shown. N2 (g) + 3H2 (g) ⇌ 2NH3 (g) How will the reaction be affected if the pressure on the system is decreased?

A chemist needs to create a series of standard Cu2 (aq) solutions for an absorbance experiment. For the first standard, he uses a pipet to transfer 25.00 mL of a 2.96 M Cu2 (aq) stock solution to a 250.

Which statements correctly describe the rock cycle? Check all that apply. Rocks are preserved through the process. Rocks change from one type to another. Different rock groups are interrelated.

Is sugar a chemical?

Oxidation-reduction reactions occur because of the competition between particles for

A light-year measures the distance a light beam can travel in one year. One light-year is equal to 9 500 000 000 000 kilometers.

The first ionization energy, e, of a potassium atom is 0.696 aj. what is the wavelength of light, in nm, that is just sufficient to ionize a potassium atom? values for constants can be found here.

A gene is a to a chromosome as (A) a pea is to a pod (B) a front to a back (C) a bike is to a car (D) a building is to a window

How are you enjoying this weather? (i need good reasons}

In today's experiment, some lab students let their chromatograms elute slightly longer than others. If one student's solvent front traveled to 9.80 cm, and another student's solvent front traveled 8.