# How many molecules are present in a drop of ethanol, C2H5OH, of mass 2.3 × 10–3 g? (L = 6.0 × 1023 mol–1)

The drop of ethanol contains ##3.0xx10^19## molecules of ethanol.

The molar mass of ethanol is ##”46.06844 g/mol”##.

You will first need to determine the moles of ethanol present in the drop by dividing its mass by the molar mass of ethanol. Then calculate the number of molecules of ethanol by multiplying the moles ethanol times ##6.022xx10^23″molecules/mol”##.

Determine Moles

##2.3xx10^(-3)cancel(“g CH”_5″OH”)xx(1″mol CH”_5″OH”)/(46.06844cancel(“g CH”_5″OH”))=”0.000050 mol CH”_5″OH”=5.0xx10^(-5) “mol CH”_5″OH”##

Calculate Molecules

##5.0xx10^(-5)”mol CH”_5″OH”xx(6.022xx10^23″molecules CH”_5″OH”)/(1″mol CH”_5″OH”)=3.0xx10^19″molecules CH”_5″OH”##

## 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.

Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.

### Fair-cooperation guarantee

By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.

Order your essay today and save 10% with the coupon code: best10