A compound was found to consist of 2. 128 grams of beryllium, 7. 557 grams of sulfur and 15. 107 g of oxygen. Determine the empirical formula for this compound.

Nitrogen (n), phosphorus (p), and potassium (k) are the main nutrients in plant fertilizers. according to an industry convention, the numbers on the label refer to the mass percents of n, p2o5, and k2o, in that order. calculate the n: p: k ratio of a 30: 10: 10 fertilizer in terms of moles of each element, and express it as x: y: 1.0.

What are the first three quantum numbers for the electrons located in subshell 2s?

The number at the end of an isotope’s name is the number.