Calculate the actual yield if a reaction of 7.6 g of aluminum and 7.4 g of O2 produces aluminum oxide with a percent yield of 77.8 %. Just need help with the equation (don't need to be given the answer)

What is the molar mass of babr2? a. 217.2 g/mol b. 297.1 g/mol c. 354.5 g/mol d. 434.4 g/mol

Iwill give extra points to who gets this right

Which describes interactions between substances and stomata during photosynthesis? check all that apply. oxygen enters stomata. oxygen is released through stomata. carbon dioxide enters stomata. carbon dioxide is released through stomata. hydrogen enters stomata. hydrogen is released through stomata.