How to measure dry mass?

[l0sthart]

How to measure dry mass? is there any equation or so? Hope to get a reply soon. Thanks (:

[canalon]

No equation. One simple experimental procedure:
take sample put in the oven/desiccator until totally dehydrated and weigh. That simple.

[Cristgonz]

canalon is right.
you don't need an equation.
just weigh it and then put it into a "furnace" and then weigh it again (you could know your water and dry mass weight).

[MichaelXY]

All bets are off if you try this on the moon however

[canalon]

Not really. If you use a balance calibrated to measure the actual weight in the moon gravity field, it will give you the exact same answer. Why wouldn't it. Just use properly calibrated instruments. That is what Quality control is used for

[MichaelXY]

Yes I realize this, my point was that gravity plays a role in weight.

[MrMistery]

or simply measure with the same instrument and multiply by six.

[canalon]

or simply measure with the same instrument and multiply by six.

Calibration can often be just that

[Cristgonz]

go to the moon and measure haha.
Canalon is right again, just a well calibrated instrument and wuala.