How many grams are in 4.78 liters of carbon dioxide gas (at stp)?
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0.178 grams

0.178 grams is the mass of one liter, so: The density of He is 0.178 g/L. Partial Pressure: A 10.0-L flask at a temperature of 300.0 K contains one mol of O2 gas, 2 moles of CO2 gas, and 7 moles of N2 gas.

Explanation:

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.