5. How many mL of coffee can be obtained from 10.0 g of coffee beans? Use one pound of coffee beans yields 50 cups of coffee and the following conversions:
4 cups = 1 qt. 2.2 lb. = 1 kg
1 qt = 0.946 liters
1000 g = 1 kg 1L = 1000 mL

Dumbledore decides to gives a surprise demonstration. he starts with a hydrate of na2co3 which has a mass of 4.31 g before heating. after he heats it he finds the mass of the anhydrous compound is found to be 3.22 g. he asks everyone in class to determine the integer x in the hydrate: na2co3·xh2o; you should do this also. round your answer to the nearest integ