The proton mass is 1.007276 amu , the neutron mass is 1.008665 amu , and the electron mass is 5.486×10−4 amu . What is the expected mass of a sodium-23 nucleus, based on the total mass of its protons and neutrons?
Express your answer in atomic mass units using seven significant figures.

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.

Stage in which a typical star has completely stopped fusion

Suppose that a certain fortunate person has a net worth of $71.0 billion ($7.10×1010). if her stock has a good year and gains $3.20 billion (3.20×109) in value, what is her new net worth?