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AleksandrR [38]
3 years ago
14

n an experiment the gram atomic mass of magnesium was determined to be 24.7. Compared to the accepted value 24.3, the percent er

ror for this determination was A) 0.400 B) 1.65 C) 24.7 D) 98.4
Chemistry
1 answer:
AysviL [449]3 years ago
4 0

Answer:

B) 1.65

Explanation:

See the image uploaded for the percent error formula

Work:

Theoretical Value - Accepted Value/Accepted Value * 100

= (24.7-24.3)/24.3 * 100

= 0.4/24.3 * 100

= 0.0164609053 * 100

= 1.64609053

Can be rounded to 1.65%

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What is the mass of 0.60 moles of Al?
nikitadnepr [17]

It helps to map out how you will navigate through your unit analysis problem before setting it up.  

You are given moles and need grams.  What can be used as a conversion factor from moles to grams?  Molar mass.  We are working with aluminum, so we will need the molar mass of aluminum.  My Periodic Table tells me the molar mass of aluminum is approximately 27 g/mol.  Now we are ready to set up the unit analysis.

0.60molAl(\frac{27gAl}{1molAl} )=16.2 gAl

Moles must go on the bottom so that they cancel.  Notice how our number of significant figures is 2, so the answer must round to 16 g Al.

<h3>Answer:</h3>

16 grams

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3 years ago
Describe how thin layer chromatography is used in the isolation and extraction of lipids​
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Thin layer chromatography(TLC) works with the principle of separation through adsorption.

It is used in the isolation and extraction of lipids through the following steps:

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brainly.com/question/3137660

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3 years ago
Which molecule is produced by the transferring of electrons?
9966 [12]
C. Sodium chloride

hope it helps u hehe :)
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2 years ago
Seed-bearing plants are ales referred to as ?
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Janice is given a mixture of alcohol and water. The teacher tells her that she can use temperature to separate these compounds.
Rina8888 [55]
Hello!

The property that is being demonstrated when Janice was given a mixture of alcohol and water and her teacher told her that she could use temperature to separate these compounds is boiling.

The boiling point is the temperature when a substance goes from liquid state to gas state. If two liquid substances with different boiling points are in a mixture, they can be separated by heating one of them to its boiling point and condensing the gas in another container in a process called distillation. The difference in boiling points of alcohols (usually lower than water) and water allows to separate them in a mixture.

Have a nice day!


8 0
3 years ago
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