Which of the following elements exist as diatomic molecules?
a. helium
b. potassium
c. nitrogen
d. sulfur

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

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

Light waves travel than sound waves.