When calcium carbonate reacts with hydrogen chloride, if the reaction occurs with 78.5% yield, what mass of carbon dioxide will be collected if 19.88g of caco3 is added to sufficient hydrogen chloride?

What is the formula for the molecular compound nitrogen monoxide

Ineed this asap part i: scientific method what is the difference between science and pseudoscience? what is the scientific method?

Observation and experimentation have led many scientists to accept a theory about the origin of the universe. this theory is called the big bang theory. scientific evidence collected and observed by scientists around the world suggests that the universe is ever expanding from a hot and dense initial state. what makes this a scientific theory? (2 points)