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nata0808 [166]
4 years ago
14

1. What is the difference between a systematic error and a random error?

Chemistry
1 answer:
Vinil7 [7]4 years ago
8 0

Answer:

Random error causes a slight difference of one measurement to from the next. It is quite unpredictable in it's variation during an experiment.

Systematic error always affects measurements by the same proportion, provided that a reading is taken the same way each time. It is predictable

Analytical errors are considered as either systematic or random. Different quality control rules in different regions comes in handy in detecting and regulating different analytical errors.

Explanation:

Here are some examples :

Systematic Error includes errors within the bounds of intrinsic method bias, instrument bias, reagent lot bias, calibration bias, within run bias.

Random Error includes errors that springs up from matrix interference, mechanical variation, electrical interference, photometer/detector variation, specimen problems (fibrin clots).

Acceptable errors may also exist and thus exist as implied by its name.

Leadership is key as it is an umpire to deciding and minimising these errors when it characterises them. It should circumspect key aspects like trust, setting an example, developing staff and critically setting the vision for the organisation.

Organisations may also have internal characteristics such as the degree of formalisation, centralisation, and complexity.

Medical organisations can have internal tensions because of the dichotomy between the bureaucratic and the shadow medical structures, errors should be minimal in all these.

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What would be the composition and ph of an ideal buffer prepared from lactic acid (ch3chohco2h), where the hydrogen atom highlig
Mashutka [201]

Answer:

P_H =2.86

c=1.4\times 10^{-4}

Explanation:

first write the equilibrium equaion ,

C_3H_6O_3  ⇄ C_3H_5O_3^{-}  +H^{+}

assuming degree of dissociation \alpha =1/10;

and initial concentraion of C_3H_6O_3 =c;

At equlibrium ;

concentration of C_3H_6O_3 = c-c\alpha

[C_3H_5O_3^{-}  ]= c\alpha

[H^{+}] = c\alpha

K_a = \frac{c\alpha \times c\alpha}{c-c\alpha}

\alpha is very small so 1-\alpha can be neglected

and equation is;

K_a = {c\alpha \times \alpha}

[H^{+}] = c\alpha = \frac{K_a}{\alpha}

P_H =- log[H^{+} ]

P_H =-logK_a + log\alpha

K_a =1.38\times10^{-4}

\alpha = \frac{1}{10}

P_H= 3.86-1

P_H =2.86

composiion ;

c=\frac{1}{\alpha} \times [H^{+}]

[H^{+}] =antilog(-P_H)

[H^{+} ] =0.0014

c=0.0014\times \frac{1}{10}

c=1.4\times 10^{-4}

6 0
4 years ago
How heat moves from one end of a solid to another
pantera1 [17]
In conduction, the thermal energy of a particle is transferred to other particles throughout the solid. The particles with more energy are transferred to those with less.
3 0
4 years ago
2.5 moles of sodium chloride is dissolved to make 0.050 liters of solution
Hitman42 [59]

The answer is:

the molarity = 50 moles/liters

The explanation:

when the molarity is = the number of moles / volume per liters.

and when the number of moles =2.5 moles

and the volume per liters = 0.05 L

so by substitution:

the molarity = 2.5moles/0.05L

                    = 50 moles /L

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3 years ago
Prokaryotes store their DNA in a nucleus.<br> True<br> or false
kirill [66]
False, because prokaryotes do not have a nucleus.
3 0
3 years ago
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4. For many students, the reaction flask will become warmer during oxygen generation and the reaction rate will become faster. E
vladimir2022 [97]

Answer:

See below

Explanation:

Reactions require successful collisions between elements or molecules.  A rise in temperature increases the movement of molecules.  The more movement, the more collisions.  The more collisions, the more reactions.  The collisions release energy as heat which warms the flask and so on.

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3 years ago
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