An electrically neutral atom of gallium has 31 electrons and 39 neutrons. What is the mass number of the atom?

What accounts for most of an atoms volume

Mathematically define heat capacity with equations.

What is the number of moles in 1 mole of sodium sulfate? A) 1.204 x 1024 ions B) 1.807 x 1024 ions C) 2.007 x 1023 ions D) 6.022 x 1023 ions

Explain, in terms of structure, why some polymers are thermosetting.

How many neutrons does bromine have? a. 10 b. 35 c. 45 d. 80

Initially you dissolved all, or most, of the p-aminobenzoic acid in ethanol. then you slowly added sulfuric acid. as you did this, a large amount of white solid formed. during the course of the reaction, that white solid dissolved.

How do you know if a chemical reaction has occurred?

Why must a container or system be closed for equilibrium to be established?

What is the bond angle between the hydrogen atoms in an ammonia (NH₃) molecule?

In Experiment 1, the density of pure ethanol was found to be:Question 1 options:less than 0.793 g/mL. 0.793 g/mL. 0.999 g/mL. greater than 0.999 g/mL.