The Best Analytic Chemistry Books of 2023

FOR BASIC TEACHING TO ADVANCED SCIENCE: 444 pieces molecular model kit, including 132 atoms, 158 bonds and 150 parts for Carbon-60(Fullerene), provides to students from Grade 7 to Graduate level.

TWO CHEMICAL STRUCTURE MODELS: The ball-and-stick models use spheres to represent atoms and sticks to represent chemical bonds. In the space-filling model, the spheres are drawn to scale and are next to one another as atoms are in real molecules.

CHEMISTRY EDUCATIONAL MOLECULE MODEL IN 3D: It can display chemical structure, molecular bond, and bond angle in all directions. Demonstrate fundamental molecular geometry, chemical molecular structure, stereochemistry with 3D modeling studies.

EASY TO LEARN: The universal standard adopted for each atom's color makes it easier for you to use and learn. Atoms and chemical bonds combine tightly and firmly and can be easily disassembled by disconnecting tools.

If you’re not in love with it for whatever reason, we’ll give you a full replacement or refund—no questions asked. If you have any doubt, please tell us. With nothing to worry about, or even to share with your friends, try it now.

CROWN ARCHETYPE

Back Bay Books

Paper Size: 45mm x 7mm (L x W), Comes with 3 Pack(240 pH Strips) and 1 Storage Case.

The test strip color changes must be matched with the pH scale color chart within about 15 seconds. Different pH content discoloration range is different, by comparing the color card ratio: the smaller the number, the stronger the acidity, the larger the value, the stronger the alkalinity.

Please do not dip the PH strips in the test liquid. It might lead to incorrectly showing test result. Please drop the test liquid on the PH strips. It will perfectly indicates the real acidic or alkalinity substance.

There is a strong correlation between the pH of the body's internal environment and pH paper help you to maintain good healthy body by testing many usual substances, including moisturized soap, lemon juice, milk, liquid detergent, moisturized soil, saliva, urine, sweat, etc

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