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galina1969 [7]
3 years ago
15

WHICH STATEMENT BEST DESCRIBES THE ARCHERS SHOOTING

Chemistry
2 answers:
Delicious77 [7]3 years ago
8 0

Answer:

neither accurate nor precise

Explanation:

<u>The statement that best describes the Archers shooting is that it is neither accurate nor precise.</u>

Accuracy means the closeness of a measurement to the true measurement value while precision is the closeness of repeated measurement made under the same conditions.

<em>None of the Archers shot hits the bull's eyes. Hence his shots are described as not being accurate.</em>

<em>Also, the various shots made by the Archer are some distances away from one another. It thus means that the shots are not precise.</em>

Hence, the shots are neither accurate nor precise.

vazorg [7]3 years ago
7 0

Answer:

neither accurate nor precise

Explanation:

Accuracy is the ability to give the same result on different measurements made under the same conditions or to give the desired result accurately, therefore, as observed in the image, the results are not accurate, since they are all different.

They are not precise either, since the precision is the degree of agreement between the independent results of a measurement, obtained under stipulated conditions, be it repeatability, reproducibility or intermediate.

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To determine the concentration of chloride ion (Cl-) in a 100 mL sample of ground water, a chemist adds a large enough volume of
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Answer:

[Cl^-]=232.3\frac{mgCl^-}{L}

Explanation:

Hello,

In this case, we can represent the chemical reaction as:

Cl^-(aq)+AgNO_3(aq)\rightarrow AgCl(s)+NO_3^-(aq)

In such a way, since the mass of the obtained silver chloride is 93.9 mg, we can compute the chloride ions in the ground water by using the following stoichiometric procedure whereas the molar mass of chloride ions and silver chloride are 35.45 g/mol and 143.32 g/mol respectively:

m_{Cl^-}=93.3mgAgCl*\frac{1mmolAgCl}{143.32mgAgCl}*\frac{1mmolCl^-}{1mmolAgCl} *\frac{35.45mgCl^-}{1mmolCl^-} =23.23mgCl^-

Finally, for the given volume of water in liters (0.100L), we compute the required concentration:

[Cl^-]=\frac{23.2mgCl^-}{0.100L}\\

[Cl^-]=232.3\frac{mgCl^-}{L}

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4 years ago
Which of the following should be classified as a mixture? water air iron helium
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There are three stable isotopes of magnesium. Their masses are 23.9850, 24.9858, and 25.9826 u. If the average atomic mass of ma
olganol [36]

Answer:

²⁵ Mg = 10.00%

²⁶ Mg = 11.0%

Explanation:

Given that:

Magnesium ²⁴Mg has an abundance of 78.99%

Hence, (100 - 78.99)% = 21.01%

21.01% is the abundance of ²⁵ Mg and ²⁶ Mg

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²⁶ Mg = (21.01 - x)%

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avg. atomic mass = \dfrac{78.99}{100 }(23.9850)+\dfrac{x}{100}(24.9858) +\dfrac{21.01-x}{100}(25.9826)

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0.9968x = 2440.46915 - 2430.5

0.9968x = 9.96915

x  =  9.96915/0.9968

x  =  10.00%

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²⁵ Mg = x

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²⁶ Mg = 11.0%

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