Based on the given molecular formula, the molar mass of ethylene glycol is 62 g/mol. We solve for the number of moles of the solute,
n = (7.1 kg)(1000 g/ 1 kg) / 62g/mol = 114.52 mol
Then, we divide this value by the given mass of the water in kg
m = (114.52 mol) / 1.2 kg = 95.43 m
Thus, the molality of the substance is approximately equal to 95.43 m.
In case of endothermic reactions the system gains heat from surrounding and thus lead to decrease in temperature of surrounding making it cold as conpared to system and we can feel thus with a drop in temperature.
In case of exothermic reactions the system loses energy and thus itself becomes cold and increase the Temperature of surrounding.
Answer:
I think finding the source of the fire would be the most difficult aspect seeing as though the fire would have burned any evidence
Explanation:
4K + O₂ ⇒ 2K₂O
4mol : 2mol
1,52mol : x
x = 1,52mol*2mol / 4mol = 0,76mol
Answer:
I think you have to freeze the water itself then take the temp with a thermometer ️of each one then record how long it takes each one to start freezing then how long it takes for it to melt
Explanation:
sorry if I'm wrong but you have to do the experiment yourself then fill it out