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Feliz [49]
3 years ago
10

Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. Precision pertains

to all of the following except a. reproducibility of measurements. b. agreement among numerical values. c. sameness of measurements. d. closeness of a measurement to an accepted value.
Chemistry
2 answers:
Eduardwww [97]3 years ago
6 0
D.) closeness of a measurement to an accepted value
That is accuracy not precision.
malfutka [58]3 years ago
4 0

Answer:

closeness of a measurement to an accepted value.

Explanation:

Precision is when we are performing an experiment and taking multiple readings at the same time and we are getting the values close to each other or same. The experiment will be called as precised.

But if we are getting values of our experiment close to actual value or similar to actual value then the experiment will be accurate.

Thus reproducibility of measurements, agreement among numerical values and sameness of measurements are same and are associated with precision.

While closeness of a measurement to an accepted value pertains to accuracy.

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10.moles of glucose = 450g/180.16 g/mol =2.50 moles

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The amount of heat required to convert H₂O to steam is :  382.62 kJ

<u>Given data :</u>

Mass of liquid water  ( m ) = 150 g

Temperature of liquid water = 43.5°C

Temperature of steam = 130°C

<h3 /><h3>Determine the amount of heat required </h3>

The amount of heat required = ∑ q1 + q2 + q3 ----- ( 1 )

where ;

q1 = heat required to change Temperature of water from 43.5°C to 100°C .  q2 = heat required to change liquid water at 100°C to steam at 100°C

q3 = heat required to change temperature of steam at 100°C to 130°C

  • For q1

M* S_{water}*ΔT

= 150 * 4.18 * ( 100 - 43.5 )

= 35425.5 J

  • For q2

moles * ΔHvap

= (150 / 18 )* 40.67 * 1000

=  338916.67 J

  • For q3

M * S_{steam} * ΔT

= 150 * 1.84 * ( 130 -100 )

= 8280 J

Back to equation ( 1 )

Amount of heat required = 35425.5  + 338916.67 + 8280 = 382622.17 J

                                                                                               ≈ 382.62 kJ

Hence we can conclude that The amount of heat required to convert H₂O to steam is :  382.62 kJ.

Learn more about Specific heat of water : brainly.com/question/16559442

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