Questions: 1) If You Have A 13 Gram Object, How Many Significant Figures Are In A Reading Obtained From A Top-Loading Balance? 2) A Top-Loading Weighs To +0.5 G. How Many Mg Is That? 3) If A Procedure Tells You Weigh The Sample To The Nearest Milligram, Which Balance Would You Use? The Analytical Or The Top-Loading? 4) An Analytical Balance Usually Weighs

 

Questions: 1) If you have a 13 gram object, how many significant figures are in a reading obtained from a top-loading balance? 2) A top-loading weighs to +0.5 g. How many mg is that? 4 Sin Fig I sig Fig 3) If a procedure tells you "Weigh the sample to the nearest milligram", which balance would you use? (The analytical or the top-loading? analytical Balance 4) An analytical balance usually weighs to 0.1 milligram. How many grams is that? 5) If a procedure tells you to "Add about 3 g of ammonium sulfate" which kind of balance should be used? (The analytical or the top-loading ?) 6) If a procedure tells you to "Weigh to the nearest tenth of a gram about 3 grams...", which balance would you use, the analytical or the top-loading 7) If a procedure says "Weigh about 0.8 g to the nearest 0.1 milligram", which balance would you use, the analytical or the top-loading? 8) The vessel to be weighed should be placed (off to the side, or in the center) of the pan. 9) After heating a sample in a dish it will save time to weigh it immediately or cool it completely? 10) To avoid the errors in mass due to the use of balances that are not calibrated, one should weigh by a method called 11) If you weigh a hot object on the balance, the reading will be higher, the same, or lower than if it had been weighed after it cools to room temperature? (higher, the same, or lower), 12) If you weigh a cold object on the balance, the reading will be higher, the same, or lower than if it had been weighed after it warms up to room temperature? (higher, the same, or lower) -6-