Answer: The correct answer would be : "A bottle that is sealed".
I hope that this helps you !
There’s only one measurement the question doesn’t make sense
Gamma rays have the highest penetrating power so it can only be stopped by thick layers of dense metal. :)
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What you have to do is find a periodic table and add the mass of each atom that the compound is made of.
Ca= 40.1
O= 16.0
H= 1.01
keep in mind that you have to also account for how many atoms of each there are in the molecule. for example, in Ca(OH)2, there are one Ca, two O and two H
so the molar mass of Ca(OH)2= 40.1 + (2 x 16.0) + (2 x 1.01)= 74.12 g/mol
