What is the atomic mass of an element that has 33 protons and 42 neutrons

Nitrogen is a group 15 element. What does being in this group imply about the structure of the nitrogen atom? O A. Nitrogen has 15 valence electrons. OB. Nitrogen has 15 neutrons. OC. Nitrogen has 5 valence electrons. D. Nitrogen has 5 neutrons.

The chemical equation for the formation of ammonia is unbalanced. 3H2 (g) + N2 (g) NH3 (g) If three molecules of hydrogen react with one molecule of nitrogen, how many molecules of ammonia would be formed?

If I have 340 mL of a 0.5 M NaBr solution, what will the concentration be if I add 400 mL more water to it? A. 0.03 molar B. 0.13 molar C. 0.23 molar D. 0.33 molar

According to the law of mass action, what must be equal at equilibrium?

What is the density of any object with a mass of 120g and volume of 7mL?

Gases and liquids will both expand to fill their container. True False ... ?

Which of the following best explains why electrometallurgy is a useful process in many industries? A.) Electrometallurgy can etch permanent marks and designs into the surfaces of metal products. B.

Your TLC results for ortho-hydroxyacetophenone versus para-hydroxyacteophenone will indicate that one compound is significantly less polar than the other.

A box contains equal amounts of helium, argon, and krypton (all gases) at 25 ∘c. part a consider the temperatures, masses, average velocities, and average kinetic energy of the three kinds of gas in the mixture.

Why are coastal zones productive?