If an atom has an atomic number of 12 and a mass number of 16 how many protons does it have

Alice added sodium chloride to water and stirred the water for several minutes. Alice is most likely trying to demonstrate that ionic compounds 1. are hard 2. can dissolve 3. are clear 4. can melt

How many molecules (not moles) of nh3 are produced from 6.96*10-4 g of h2? express your answer numerically as the number of molecules?

Which of the following kingdoms in one-celled organisms

Tornados and hurricanes develop over

How many particles are in 12.47 grams of NaCl?

Which of the following lines (of latitude or longitude) would represent by 180 longitude? South Pole Equator Prime meridian North Pole International date line

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