One of the primary substances used in sandpaper is Silicon carbide, SiC. It is produced by heating silicon dioxide, SiO2, with Carbon in a high intensity furnace. The other product is carbon monoxide, CO. What is the percent yield when 202 grams of SiC is produced from the reaction of 334.5 grams of carbon with 427 grams of SiO2? SiO2 (s) + C (s) → SiC (s) + CO (g) (unbalanced equation)

Which ocean zone has the most abundant primary producer and why a) the abyssopelagic zone ,du to the absence of light and cold water temperatureb) the bathypelagic zone, due to the absence of light and cold water temperaturec) the mesopelagic zone ,due to uts high light availability and warm water temperature d) the epipelagic zone, due to its high light availability and warm water temperature