During the reaction, two atoms combine under extreme heat and pressure to form a atom

If 1.63 times 10 negative 4 of helium dissolves in 100.0g of water, what is the concentration in parts per million

Compare and contrast the bohr model and the electron cloud models of the atom.

If 15 drops of ethanol from a medical dropper weight 0.60g, how many drops does it takes from a dropper to dispense 1.0ml of ethanol? the density of ethanol is 0.80g/ml