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aleksandr82 [10.1K]
2 years ago
9

An object was measured by a worker as 14.6 cm long, however, the manufacturer specifications list the length of the object at 14

.4 cm. What is the percent error in the workers measurement
Chemistry
1 answer:
Nitella [24]2 years ago
4 0

Answer:

Explanation:Answer - 0.73%

14.6            .2

         =          

100              x

(Above is proportions I used to get the answer)

x = 0.73% which is the answer.

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An ice cube is placed on a kitchen counter. Which best describes heat flow in this situation
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3 years ago
How will the following changes affect the mole fraction of chlorine gas, χcl2, in the equilibrium mixture.?
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3 years ago
How many grams of NaF should be added to 500 mL of a 0.100 M solution of HF to make a buffer with a pH of 3.2
Korolek [52]

Answer:

2.25g of NaF are needed to prepare the buffer of pH = 3.2

Explanation:

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pH = pKa + log [A-] / [HA]

<em>Where pH is the pH of the buffer that you want = 3.2, pKa is the pKa of HF = 3.17, and [] could be taken as the moles of A-, the conjugate base (NaF) and the weak acid, HA, (HF). </em>

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1.017152 = [A-] / [0.0500moles]

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0.0536 moles NaF * (41.99g/mol) =

<h3>2.25g of NaF are needed to prepare the buffer of pH = 3.2</h3>
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2 years ago
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