A 0.1888 g of a hydrocarbon samples is combusted and produces 0.6260 g CO2 and 0.1602 g H2O. What is the empirical formula for this compound? (Note a hydrocarbon only contains carbon and hydrogen.)

Esign techniques and materials that reduce the negative environmental impact of a structure are referred to as

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

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.