Theory: The purpose of this lab was to confirm the chemical formula of magnesium oxide by comparing the masses of pure magnesium solid prior to any reaction and magnesium oxide solid after a reaction between all of the magnesium and oxygen from the air when heated from a Bunsen burner in a crucible. Using molar masses of both magnesium and oxygen‚ an expected percent composition‚ by mass‚ was found and compared to our experimental results. Experimental: 1. Setup ring stand 2. Obtain desired amount
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Lab Questions Unit 4 1. Who were the Poor Clares? Why is it somewhat surprising that they were accomplished musicians? Poor Clares were nuns from a catholic church. It is surprising that they were skillful musicians because they secluded themselves in the church. So people didn’t know what they were doing. When they did come out it shocked everyone. 2. What is a chanson? A chanson is a French song. 3. What is the song "Five Knacks for Ladies" about? What type of song is it? The song is saying that
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purpose of this lab was to study the specific characteristics of cations and anions‚ and ultimately to be able to identify an unknown substance based on our studies and tests using the logic trees developed through the experiment. A logic tree is a graphical display of the findings from this lab which‚ through a series of yes/no questions‚ elimination tests‚ will help us to identify and unknown sample. This lab will result in 2 logic trees‚ one for identifying cations and the other
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Physics 211 Experiment #4 Newton’s Second Law – Atwood’s Machine Newton’s second law (FNET = ma) can be experimentally tested with an apparatus known as an “Atwood’s Machine” (See Figure 1.) Two weights of unequal mass‚ connected by a thread‚ are draped over a pulley‚ as shown in the figure. When released‚ the larger mass accelerates downward and the smaller one accelerates upward. Figure (1a): The Atwood’s Machine‚ showing the pulley and the two masses after a run. Figure (1b): A close
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protection | 1 | Stopwatch | 2 | Boiling tube and rack | 9 | Beaker (100ml) | 3 | Measuring cylinder (50ml) | 1 | Label | 9 | Glass rod | 1 | Syringe | 3 | MATERIAL | QUANTITY | Glucose solution with different concentration | 60cm3 | Sulphric acid (1M) | 45cm3 | Potassium permanganate | 18cm3 | 3 unknown solution | 10cm3 for each
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Object Estimated mass (g) Actual mass (g) Actual mass (Kg) Mechanical pencil 4g 5.55g .00555kg 3 pennies 9g 8.7g .0087 kg 1 quarter 6g-7g 5.75g .00575 kg 2 quarters‚ 3 dimes 13g 18.3g .0183 kg 4 dimes‚ 5 pennies 20g 18.45g .01845 kg 3 quarters‚ 1 dime‚ 5 pennies 28g 34.0g .034 kg Key 6g-7g 7.65g .00765 kg Key‚ 1quarter‚ 4 pennies 25g 24.55g .02455 kg Mass A Mass B Mass B-A Liquid Volume (ml) Graduated cylinder (g) Graduated cylinder Liquid (g) Liquid (g) Density
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Conductor Investigation Experiment LabReport Introduction This experiment is about to test how will the nichrome wire effect the ampere of the electric current. All the possible factor that will effect to the volt of the current • The Length of the wire • The Diameter of the wire • Temperature • Magnetism Aim To determine the effect of the length of the wire on the ampere of the electric current. Hypothesis Nichrome is an alloy(a metal made by combining two or more metallic elements)
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Purpose: We are doing this experiment to find the best ratio of potassium nitrate to powdered sugar for a model rocket motor that will create the most thrust. We are also testing if adding fins will affect the flight distance of the rocket. Hypothesis: The best ratio for potassium nitrate to powdered sugar is 1 to 3 because Grant Thompson‚ who has experimented with the best ratio of powdered sugar to potassium nitrate‚ has stated that “The 1 to 3 ratio is best for creating the most amount of thrust
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RESULTS Aphid survival experiment Aphid survival rate varied with both of different combinations of predators-aphids and various times in presence or absence of ants (Table 2). GLM results showed that the interaction of ‘time × different combinations of predators and aphids × ant’ (F = 0.211; df = 10‚ 317; P = 0.995)‚ ‘ant × time’ (F = 0.490; df = 2‚ 317; P = 0.613) and ‘different combinations of predators and aphids × time’ (F = 1.639; df = 10‚ 317; P = 0.095) on the survival rate were not significant
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Pharmaceutics Experiment 2 Preparation of a Hand Cream OBJECTIVE 1. To learn the method of preparing a hand cream. 2. To appraise the function of the ingredients in the hand cream. BACKGROUND Cream is a kind of dosage form and particularly hand cream is formulated to carry out a variety of cosmetic functions. Among these are softening and moisturizing the skin; elimination of natural waste products (oils) by emulsification; and cooling the skin by radiation‚ thus helping to maintain body temperature
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