The atomic mass of boron is 10.81 amu. Boron has two isotopes: Boron-10 has an approximate mass of 10 amu. Boron-11 has an approximate mass of 11 amu. In nature, which isotope of Boron is more abundant (common)?

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.

Pastoral farming is best described as a. a method of raising livestock and moving herds b. an african method of agriculture c. a method of cultivating crops on poor soils d. a common method of desert farming select the best answer from the choices provided a b c d

Salt in oceans comes from and of rocks