What is a lightning?​

Titania buys a bag of fertilizers at the store.it reads 30-15-10. how much phosphorous is in the fertilizer a. 30% b. 15% c. 10%

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

Three alkali metals in group 1 are a. calcium, strontium, barium b. boron, aluminum, gallium c. sodium, potassium, rubidium d. fluorine, iodine, chlorine