Which of the following has the greatest mass, in grams?

a. 1 atom of lead (Pb)

b. 0.5 mol copper (Cu) atoms

c. 0.3 mol gold (Au) atoms

d. 25 atoms of mercury (Hg)

which term best describes the form sound takes as it travels away from a drum (A - gas) (B-music) (C-waves) (D-particles

Which of the following would need resonance structures? SO2 CH4 O2 CO3-2

Calculate the volume in liters of a * 4.3910-5/moll mercury (ii) iodide solution that contains 500. mg of mercury (ii) iodide hgi2. round your answer to 3 significant digits.

Who was the first chemist to organize elements by atomic number?

What has more kinetic energy 10kg of bees flying at 10m/s or 10kg of birds flying at 10m/s? Why?

How many particles are in 1 mole of a substance?

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?