Which arrows represent carbon dioxide entering the atmosphere because of the use of fossil fuels?

Imagine that twenty i.u.’s of enzyme z were catalyzing the above reaction for one minute, under vmaxconditions, in a 3.00 ml assay volume. the assay is buffered with 20 mm phosphate buffer, ph 7.60. what will the ph be at the end of that one minute?

Helium decays to form lithium. which equation correctly describes this decay?

Rays from the sun are not considered matter true or false