Good morning and welcome to chemistry!

We continue today with a two-part math problem.

You’ll need to find the molar mass.

Then set up your double cross of science.

Put the given in the top left section.

Change to moles.

Then, convert moles to molecules.

Show all your work, otherwise it is all for naught.

Aluminum sulfate, sometimes called Alum, is useful in cleaning up water for drinking:

Ever wonder how we manage to have safe drinking water flowing out of our faucets? You can thank aluminum sulfate. Municipal water suppliers, such as your local water utility company, make use of alum to treat water for human consumption. In addition, process water (non-drinking water) may also be treated with this chemical for purification when bacteria / sediment would cause an adverse effect.

When added to water, aluminum sulfate causes microscopic impurities to clump together into larger and larger particles. These clumps then settle to the bottom of the container and can be filtered out. This makes the water safer to drink. On the same principle, alum is also sometimes used in swimming pools to decrease water cloudiness

Source: https://www.affinitychemical.com/aluminum-sulfate-composition-and-uses/

1. How many grams of aluminum sulfate is 8.19 x 10²⁷ molecules of aluminum sulfate? The formula is Al₂(SO₄)₃ .

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Thank you!

Stay Healthy and Stay Breezy.

T. Brown