I think the correct answer would be the first option. As the hiker reaches the top of the mountain, the plastic bag would, most likely, expand. Before starting, the plastic bag would have a certain amount of gas particles inside. As the you hike, the pressure would decrease causing for the gas molecules to reestablish equilibrium thus pushing the bag outwards. In other words, expanding the bag. Also, base from the ideal gas equation, PV = nRT, at constant temperature and number of moles, pressure and volume are inversely related. Thus, as the pressure decreases, the volume of the system would increase accordingly.
0.2701 moles of water were evaporated from the sample by the heating process
Mass of evaporating dish = 8.365 g
mass of dish + hydrate = 18.597 g
mass of hydrate = (mass of dish + hydrate) - mass of dish
hydrate = 18.597 - 8.365 = 10.232 g
Mass of dehydrated material = (mass of dish + dehydrate ) - mass of dish
dehydrated material = 18.735 - 8.365 = 5.37 g
Mass of water evaporated = hydrate - dehydrate
mass of water = 10.232 - 5.37 = 4.862 g
Molar mass of water = 18 gm/mol
no. of moles of water evaporated = mass / molecular mass
moles = 4.862/18 = 0.2701 moles
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Answer:
Advanced Pharmaceutics Inc
Explanation:
Advanced Pharmaceutics Inc
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