Term
| A Graduated cylinder has a mass of 75.072g. 2-propanol, a liquid with a density of 0.7845 g/mL, is added. The total mass is now 84.926 g. A small piece of metal is added. It sinks to the bottom of the cylinder the total mass is now 140.369 g and the volume reading is 18.36 mL. What is the density of the metal? |
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Definition
Mass of metal is 140.369g- 84.926g = 55.443g. 18.36 mL = volume of metal and 2-propanol. Mass of 2-propanol 84.926g -75.072g=9.854g.
9.854g x 1mL/0.7854gm = 12.54649 mL
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Term
| A patient is to be given 125mg of ampicillin per kg of body weight. The ampicillin is available as a 0.200g/mL solutionwhat volume of this solution should be given to a 113pound patient? (1 pound = 453.59237 g) |
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Definition
113 lbs x 453.89287g/1 lb x 1/1000g x 125 mg ampicillin/1kg body weight
= 6406.992mg ampicillin
6406.992mg x 1g/1000mg x 1mL/0.200g = 32.035mL
Give the patient 32.0 mL |
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Term
A mixture of two solids is 37.9% barium chloride. What mass, in kg, of the mixture contains 450.0 g of barium chloride?
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Definition
37.92 g BaCl2/ 100.00
450.0g BaCl2
1.187 kg mixture |
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Term
If 20.00 cal of energy are given 40.00g of metal X the temperture of X increases by 18.0° C.
If 20.00 cal of energy are given to 20.00 of metal x, how much will the temperature go up? |
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Definition
36°
20.00 cal is proportional to 40.00 g x 18 °C
20.00 cal times 20 g a° C
If 20.0 cal of energy are given to a sampleof metal X and the temperature goes up by 12°C what is the mass of the sample?
40.00 g X 18° C/12.0° = 60g
How much energy would be required to raise the tempertature of 30.00g of X by 36.0° C?
20.00 cal/40.00 g x 18.0°c = Xcalories/30.00g x 36.0 |
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Term
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Definition
energy/mass times temperature change = a constant. This constant is called the specific heat. What is the specific heat of metal X?
20.00 cal/20g * 36.0 |
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