00:01
So we're told that the molecular mass of oxygen is 16 atomic mass units.
00:06
And the molecular mass of hydrogen, of course, is just one atomic mass unit.
00:12
So the molecular mass of oxygen would just be, you know, it's h2, or sorry, water, oxygen.
00:19
H2o, so we had two hydrogens, one oxygen.
00:22
So this would be 18, right, because it's 2 plus 16.
00:25
And one atomic mass unit is approximately 1 .66 times 10 to the negative 27th kilograms.
00:34
So if we have 18 of these, just multiply 1 .66 times, or 1 .66 times into the negative 27th by 18...