4Since the flask is filled completely with 515.40 mL of water, the volume of the flask is 515.40 mL. So the volume of sulfuric acid in the flask is also 515.40 mL. 1026.57 g Mass of flask + acid – 78.23 g Mass of flask 948.34 g Mass of acid Density = mass948.34 g= volume515.40 mL= 1.840 g/mL
6. A room is 4 meters wide by 6 meters long by 3 meters high and has an air conditioner that exchanges air at a rate of 1200 liters per minute. How long will it take for the air conditioner to exchange the air in the room once? (1 mL = 1 cm3)
7. Assume that the total volume of seawater on Earth is 1.55x1021liters and that the density of seawater is 1.03 g/mL. If seawater is 3.50 % by mass NaCl, what is the total mass of NaCl present in seawater, in units of kilograms?