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Ipatiy [6.2K]
4 years ago
13

Jeffe is explaining dimensional analysis to a friend. He says that dimensional analysis can be used to convert between units. Wh

at is needed for this conversion?
Chemistry
2 answers:
mestny [16]4 years ago
5 0
<h3><u>Answer;</u></h3>

An equality that tells how much of one unit is equal to another unit

<h3><u>Explanation;</u></h3>
  • <em><u>Dimensional analysis refers to the process of conversion between various units.</u></em> It involves creation of a conversion ratio which has the units required as the numerator and those that exist in the denominator.
  • Conversion of units is very important as the rest of the world uses the metric system.  Unit analysis involves multiplying a given measurement by a known proportion or ratio to give a result with a different unit or dimension.
FrozenT [24]4 years ago
4 0
The choices can be found elsewhere and as follows:

a. an understanding of significant figures in metric units 
<span>b. an understanding of the difference between accuracy and precision of units </span>
<span>c. an equality that tells how much of one unit is equal to another unit </span>
<span>d. an algebra book that explains how linear equations can be set up with units</span>

I believe the correct answer is option C. The important thing in this conversion is an equality that tells how much of one unit is equal to another unit. 
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3 years ago
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draw the lewis structure for CO2, H2CO3, HCO3-, and CO3 2-.Rank these in order of increasing attraction to water molecules. Expl
gavmur [86]

Answer:

The structures are attached in file.

Hydrogen bonding and intermolecular forces is the reason for ranks allotted.

Explanation:

In determining Lewis structure, we calculate the overall number of valence electrons available for bonding.  Making carbon (the least electronegative atom) the central atom in the structure, we allocate valence electrons until each atom has achieved stability.

In order of decreasing affinity to water molecules:

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trapecia [35]
Use the formula q=m×Cp×delta T

m=1.500 kg=1,500 g
Co=2.52 J/g·k
delta T=0.985k

q=(1,500g)(2.52 J/g·k)(0.985k)

=3,723.3 J=3.72


I JUST FINISHED THIS QUESTION AND IT SAID THAT THE ANSWER WAS -3.72 kJ SO PUT THAT DOWN AS YOUR ANSWER....I'm not sure why the answer is negative, but this is the most work I can show. If any one knows, why this answer is negative, please advise. Thank you. I hope that this helps :)
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Answer:

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Explanation:

There are various methods used to separate single substances from a mixture. The method adopted depends upon the type of mixture and the ingredients used in it. According to the given question, the mixture comprises of sand, salt and water. Here, the first process will be the process of filtration. Through filtration, the salt-water solution and sand can be separated. Salt-water solution can be separated by the process of evaporation in which sat and water will be separated individually.

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