CFCs and their associated compounds were developed in the early 1900s as a non-toxic, non-flammable solution to other more dangerous products such as ammonia.
The second and first one but if it isn’t 2 choices then 1
Density= mass/ volume
So density = 99/10= 9.9g/cm^3
Hope this helps!! xx
Answer:
examples of things which contain potassium are:
green vegetables
root vegetables
fruits
potassium chloride
potassium sulphate
Explanation:
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