ozheng24112
13.08.2020 •
Chemistry
A rock occupies a volume of 20 cm and has a mass of 54 g. Find the density of
this rock.
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Ответ:
Hey there!
Density=Mass/Volume
Density=54/20
Density=2.7 g/cm^3
Let me know if this helps :)
Ответ:
i proposed that, since nitrogen makes up 78% of air, you could leave a crucible over an open flame for a long time to get it hot with an open lid to allow air in. thats because it is expected that you know magnesium reacts with the oxygen (burns) in the air to produce a whilte solid.
your new experiment isn't doing anything different than attempting to delay the time before magnesium is allowed to react with the elements in the air (both oxygen and nitrogen)