Answer:
30%
Explanation:
As the formula for finding concentration
= (mass of solute/mass of solution)×100
= (30/100)×100
= 0.3×100
= 30%
Answer:
Carbon dioxide is added to the atmosphere through cellular respiration and the combustion of fossil fuels
Explanation:
The third one because temperature is being used, so a meter stick wouldn’t make sense. You aren’t measuring the length of anything physically. A stopwatch measures time, which is what they are showing in the chart, so the third one is the only one that makes sense.
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A practical pursuit of alchemy was the development of metallurgy practices. As alchemists always tried to turn various metals into other things, metalworking techniques were developed even though their experiments were often unsuccessful.
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