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Andru [333]
3 years ago
9

What what is the density. Correct units please.

Chemistry
1 answer:
CaHeK987 [17]3 years ago
8 0
D=mxv so your answer should be 269.37
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students used a balance and a graduated cylinder to collect the data shown in table 7. calculate the density of the sample. if t
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Answer:

              Percentage error  =  1.88 %

Solution:

Data Given:

                 Mass of Sample  =  20.46 g

                 Volume of Sample  =  43.0 mL - 40.0 mL  =  3.0 mL

Formula Used:

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Putting values,

                 Density  =  20.46 g /  3.0 mL

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Percentage Error:

                 Experimental Value  =  6.82 g.mL⁻¹

                 Accepted Value  =  6.95 g.mL⁻¹

                 = 6.82 g.mL⁻¹ / 6.95 g.mL⁻¹ × 100  =  98.12 %

                 Percentage Error  =  100 % - 98.12 %

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Be sure to convert T from Celsius to Kelvin by adding 273.

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n = (0.720 atm)(1.90 L) / (0.08206 L atm / mol K)(306 K) = 0.0545 mol of gas

Now divide grams by mol to get the molecular weight.

3.42 g / 0.0545 mol = 62.8 g/mol
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