An atom with 39 protons and a mass number of 89 what is the number of neutrons

What is the molar mass of NH3 rounded to the nearest gram? A. 10 g B. 17 g C. 24 g D. 54 g

Jesse travels 3.0 meters east and then turns and travels 4.0 meters north. The trip requires 35 seconds. What is his velocity? 0.14 m/s 0.14 m/s, northeast 5.0 m/s, northeast 5.0 m/s, southwest

Calculate the number of moles of oxygen in a 16.3-L tank if the pressure is 331 kPa and the temperature is 197.4°C.

Why are you not suppose to go pass 400ft in the ocean? By the way this is a science question, not chemirty

What is the difference in the beginning between primary succession and secondary succession? a. secondary succession has water b. secondary succession has soil c. primary succession has soil d. primary succession has water

At which temperature would atoms of a He (g) sample have the greatest average kinetic energy? (1) 25°C (3) 273 K (2) 37°C (4) 298 K

In the reaction, HCl + H2O produces H3O + Cl, what is the conjugate acid

Draw the curved arrow mechanism for the conversion of aniline into benzenediazonium ion, and draw the final product that forms after the benzenediazonium ion is treated with

Sodium chloride is stirred into water to form a solution. in this case, what are sodium chloride and the water?

What can form as a result of a chemical reaction?