How many moles of oxygen are produced when 26.5mol of aluminum oxide are decomposed

Zeros that follow non-zeros numbers and are also to the right of a decimal point are significant

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?

14. a body is projected with velocity vi from a.at the same time another body is projectedvertically upwards from point b withvelocity v2 lies vertically below the highestpoint. both the bodies collide thenv2÷v1is