how to use balance

how to use balance - NOTICE Our balances are accurate to...

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This is a lower-case “g”, meaning the weight unit “gram”. The balance is not stabilized until this “g” appears. You should not read the balance unless the “g” is visible. Tare/Zero Bar : When you press this bar, the balance will be reset to zero and reads 0.000 on the screen. How to use and read a electronic balance? Imagine that you need to weigh out 3.00 g baking soda. 1. Always tare/zero the balance before you start (the draft shield should be closed). 2. Place a glass container or a piece of weighing paper on the balance pan and press the tare bar. The numerical readout will be “0.000” on the digital display. 3. Add 3.00 g baking soda directly onto the weighing paper or into the beaker. DO NOT WEIGH BY DIFFERENCE!
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Unformatted text preview: NOTICE: Our balances are accurate to three decimal places and you should recall your weight to three decimal places . 3.00 g means anywhere between 2.950 g and 3.050 g (recall your knowledge of significant figures and rounding). g 0.000 Always keep this weighing pan clean. Place what you are weighing gently onto it. Always keep this draft shield closed while weighing sample. It should only be opened when loading sample or removing sample from the balance pan. The balances in our lab are read to three decimal places . If the balance only shows two decimal places (this often happens after you weigh out something heavier than 100 grams), press the tare bar again to re-zero it, then three decimal places will reappear....
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This note was uploaded on 11/26/2009 for the course CHE 327 taught by Professor Josephlauher during the Fall '08 term at SUNY Stony Brook.

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