cearadenney7067
28.06.2019 •
Chemistry
What substance is helium in helium balloon?
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Ответ:
helium is a element and therefore, it is a pure substance.
Explanation:
Ответ:
$48
Step-by-step explanation:
100%-50%=50%
50%=24
100%=24x2=48
Hope this helps! Thanks