Is the tetrapeptide ala-glu-gly-lys a good buffer at ph 7.0? will it move in an electric field at ph 7.0?

Remember to use the proper number of significant figures and leading zeros in all calculations.gelatin has a density of 1.27 g/cm³. if you have a blob of gelatin dessert that fills a 2.0 liter bottle, what is its mass? 2540 g2500 g3.9 x 10-43.937x 10-4

How many protons, electrons, and neutrons are in each of the following isotopes? a. zirconium-90 b. palladium-108 c. bromine-81 d. antimony-123

How many neutrons does an element have if its atomic number is 50 and its mass number is 166