How many years ago were seven score and four years ago? (a score means 20)

What is the electron configuration of chlorine (cl) ?

A particle that has a negative charge nonpolar molecule protons neutrons electrons

How many cells are needed to create a living organism?

At 1 atm of pressure and a temperature of 0 degrees celsius, which phases of H2O can exist? A.) ice only B.) ice and water C.) ice and water vapor D.) water only E.) not enough data to calculate

What is the most electronegative element?

63Ni decays by a first-order process via the emission of a beta particle. The 63Ni isotope has a half-life of 100. years. How long will it take for 65% of the nickel to undergo decay?

Based on the standard free energies of formation, which of the following reactions represent a feasible way to synthesize the product? A. 2C (s) + H2 (g) →C2H2 (g); ΔG∘f=209.2 kJ/molB. N2 (g) + 3H2 (g) →2NH3 (g); ΔG∘f=-33.30 kJ/molC.

How do I find the molar mass of Copper (II) Nitrate?

Describe several main ideas in chemistry

What is the wavelength of a wave having a frequency of 1.75*10^ 14 s^ - 1?