Answer:
Endothermic. Endothermic phase changes take in heat from the surrounding environment; they include melting, sublimation and boiling. ... For example, the forces that hold iron atoms together are strong, so it takes high temperatures to melt iron.
Explanation:
A unit of ppm has an acronym of parts per million. The
equivalent units of ppm is therefore mg/L and mg/kg. So the ppm is:
mass Ca+ = 1.3 g = 1300 mg
ppm = 1300 mg / 3100 kg
<span>ppm = 0.42 ppm</span>
Population growth decreases as the population density increases. This may be true for non-human populations but our species has developed the ability to modify the environment to sustain a huge population size.
hope this helps
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Answer:
Solubility
Explanation:
Solubility units that incorporate units of solution include grams of solute per 100 grams of solution or grams of solute per liter of solution. Another way to express solubility is in moles of solute per liter of solution; this ratio is called "molarity."
Answer:
Biofuel: Fuel from living matter
Conservertion of energy: It's a law where energy, when bodies/particles touch in a close system stays constant.
Conduction: Where via touch heat/electricity travels to a diffrent thing.
