Balance Lab of a Copper Slug and Sodium Chloride (NaCl) on a Centigram and Electronic Scale PURPOSE/INTRODUCTION The purpose of this experiment is to learn how to weigh a substance on a centigram scale and an electronic scale through direct weight or by weight difference. The hypothesis is that all scales used should show the same weight for a given sample. The experiment should show precision and accuracy of the equipment being used. This will allow a better understanding on how to properly
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of a copper slug will be determined by both direct weighing and weighing by difference techniques. Using an electronic balance‚ the wight of a copper slug will be determined by also utilizing direct weighing and weighing by difference. Average mass of a copper slug will be calculated using five (5) copper slugs and an electronic balance. Lastly‚ the mass of two unknown weights will be determined using the electronic balance and the weighing by difference technique. The mass of a cooper slug can
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and electronic balances. Equipment 1 Centigram Balances 1 Electronic Balance 1 100ml Beakers 5 Copper Slugs 2 Unknown Weights (Label # 1‚ # 2) Procedure Centigram Balance-Direct Weighing Technique 1. Obtain the centigram balance. 2. Add the copper slug to the balance. 3. Record the mass of the copper slug in grams to the observation section. 4. Retain scale and slug for future use. Centigram Balance-Weighing by Difference 1. Obtain the centigram balance. 2
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Balance 2 100ml Beakers Watch Glass Slugs 5 Copper Slugs Sodium Chloride (NaCl) Experimental Methods: The slugs were measured by both the direct method and by difference methods. First the slugs were measured using the direct method which is done by placing the weight directly onto the centigram balance and reading the results. The slugs were then measured using the by difference method where the slug was placed into a 100ml beaker and weighed then the slug was removed and the beaker was weighed
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different centigrams was minimal and it had no significant change or impact on the weight. Also‚ I noticed that weighing by difference did give a much more accurate weighing of the copper slug when compared to the measurement taken with an electronic balance. For example‚ weighing by difference with a centigram gave a slug value of
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difference methods. In the lab we used the centigram balance‚ the mass in grams and slugs to determine both weighing and weighing by difference. Also using an electronic balance the weigh of a slug will determine by using direct weighing and weighing by difference as well. Plus the mass of two unknown weights will be determined using a electronic balance with the same weighing techniques. When using the copper slug the mass was determine accurately by both direct weighing and by weighing by difference
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Balance Direct weighing method: Mass of slug __2.03g_______ Weighing by difference: Mass of beaker | 49.06g | Mass of beaker + slug | 52.06g | Mass of slug | 3g | Part II: Electronic Balance Direct weighing method: Mass of slug _3.040g______ Weighing by difference: Mass of beaker | 50.000g | Mass of beaker + slug | 53.040g | Mass of slug | 3.04g | Part III: Average mass of Copper Slug with an Electronic Balance # slugs weighed | Mass | 1 | 3.000g | 2 | 5
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Each balance displays a different weight for the same objects. Procedure First you will need to weigh a slug on a centigram balance using the direct-weighing technique. The centigram balance can be found under the balances option under the equipment menu. Select the centigram balance and add one slug from the chemicals dialog box. Record the slug mass in the observations. Weigh the same slug directly on another centigram balance. Obtain a second centigram balance from the balances option under the
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Procedure: The Centigram Balance: Direct Weighing 1. Weigh a slug on a centigram balance using the direct-weighing technique: Obtain a centigram balance from the Balances option under the Equipment menu. Select the centigram balance and add one slug from the Chemicals dialog box. Record the slug mass in the Observations. 2. Weigh the same slug directly on another centigram balance: Obtain a second centigram balance from the Balances option under the Equipment menu and place it under the
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container plants. He needs to be controlled otherwise he will kill the plant. Adult weevils eat plant leaves during spring and summer‚ its the grubs in autumn winter attack the roots of the plants‚ plants growing in containers are most at risk. Slugs: slugs can be damaging to plants‚ they make small holes in plants and leaves slime trails behind them‚ they strip and eat seedlings‚ if they are not controlled plant wont survive. Aphids: The aphid
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