﻿ Answering questions 237 and 238 based on the model 67. Model 67 Guiding questions - Ray writers

# Answering questions 237 and 238 based on the model 67. Model 67 Guiding questions

Model 67:Concentration UnitsSome concentration units depend on the temperature and some do not. Since liquids changevolume with temperature, concentration units based on volume are temperature dependent.Molarity (M): Moles of solute present per liter of solution.Molarity =moles of soluteliters of solution. When working molarity problems and no volume is specified, it is convenient to assume 1 L.Molality (m): Moles of solute per kilograms of solvent.Molality =moles of solutekilograms of solvent. When working molality problems and no amount of solvent is specified, it is convenient toassume 1 kg.Mass Percent (w/w) or Mass%: Ratio of solute mass and solvent mass expressed as a percentagePercentby mass =-mass of solutemass of solutionx 100When working percent by mass problems and no amount of solution is specified, it isconvenient to assume 100 g of solution.Mole Fraction (Xsubstance): Ratio of the moles of a given substance to the total number of molespresent in solution.X substancemoles of a given substancetotal number of moles in solution. When working mole fraction problems and no total number of moles in solution is specified.is convenient to assume 1 mole total.Density: Ratio of mass of solution to volume of solution (g/ml)density =mass of solutionvolume of solution

Don't use plagiarized sources. Get Your Custom Essay on
Answering questions 237 and 238 based on the model 67. Model 67 Guiding questions
Just from \$10/Page

## Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
\$26
The price is based on these factors:
Number of pages
Urgency
Basic features
• Free title page and bibliography
• Unlimited revisions
• Plagiarism-free guarantee
• Money-back guarantee
On-demand options
• Writer’s samples
• Part-by-part delivery
• Overnight delivery
• Copies of used sources
Paper format
• 275 words per page
• 12 pt Arial/Times New Roman
• Double line spacing
• Any citation style (APA, MLA, Chicago/Turabian, Harvard)

# Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

### Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

### Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

### Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.