Speed=distance/time
s=19km/19min=1km/min
Answer:
Mixture problemsare ones where two different solutions are mixed together ... should be added to the first in order to get amixture of 5% salt?4) How much ... 8 6) How many grams of pure acid must be added to 40 grams of a 20% acidsolution to ... make a Mixture that perliter?15) Solution A is 50% acid and solution B is 80% ...
Step-by-step explanation:
The answer to this is atmosphere.
The atmosphere is the layer of air that surrounds the Earth and is comprised mainly of nitrogen and oxygen.
So that's why the sphere that contains the air we breathe is atmosphere.
Hope this helped :)
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