NEED HELP ASAP!! What is the molar mass of oxygen? 2HgS + 3O2 -> 2HgO + 2SO2 Show work!

Which of the following units is not an official si unit? mole liter kilogram ampere

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

Imagine if during the cathode ray experiment, the size of the particles of the ray was the same as the size of the atom forming the cathode. which other model or scientific observation would have also been supported? 1. this would support dalton's postulates that proposed the atoms are indivisible because no small particles are involved. 2. this would support bohr's prediction about electrons moving in orbits having specific energy. 3. this would support bohr's prediction about electrons being randomly scattered around the nucleus in the atom. 4. this would support dalton's postulates that proposed that atoms combine in fixed whole number ratios to form compounds.