The material that is part of the system that absorbed heat is : The water
<h3>Endothermic reaction </h3>
During Endothermic reactions heat is absorbed from the surroundings therefore the container becomes cold when touched as seen in the experiment.
The ammonium nitrate after been poured into the water at room temperature is not evenly distributed but after stirring with the stirring rod it becomes evenly distributed and its heat is been absorbed by the water, which causes the container to become cold to touch instead of becoming hot due to the high temperature of ammonium nitrate.
Hence we can conclude that The material that is part of the system that absorbed heat is : The water
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Gathering/hunting food, Protection, and Mating
Answer:
16.98 g
Explanation:
The balacend equation is
Fe2O3(s) + 2Al(s) → 2Fe(l) + Al2O3(s)
So, when 2 moles of iron (Fe) are produced, 1 mol of aluminum oxide is produced. The mass molar of the elements are:
Fe = 56 g/mol; O = 16 g/mol; Al = 27 g/mol
Then, the mass molar of Al2O3 is:
2x27 + 3x16 = 102 g/mol
The stoichiometry relation will be:
2 mol of Fe -------------------- 1 mol of Al2O3
2x56 g of Fe -------------------- 102 g of Al2O3
18.65 g of Fe -------------------- x g of Al2O3
By a direct simple three rule:
112x = 1902.3
x = 16.98 g
Answer:
Updrafts characterize a storm's early development, during which warm air rises to the level where condensation begins and precipitation starts to develop. In a mature storm, updrafts are present alongside downdrafts caused by cooling and by falling precipitation.
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<u>Answer:</u> D. the ionic compound calcium fluoride
The correct option here is the fourth one.
<u>Explanation:</u>
Salt like compounds addition to water is likely to be inducing certain changes in temperature of freezing into solid and also alter the temperature of boiling.
It is noticed that addition of salts in water mostly tends to get lower the freezing temperatures from the original freezing point of water and among the given 3 options calcium fluoride tends to lower the freezing point most when compared to others.
Thus as vant hoff factor is highest factor for and the freezing point will be lowest.