How many moles are in 11.2 L of helium gas?

Is this a scientific model? use complete sentences to explain why or why not. a graphic organizer showing the water cycle i need : ( asap i go it never mind

Measurements that have similar values are: a. usually accurate b. sometimes accurate c. always accurate d. never accurate

Molecular iodine, i2(g), dissociates into iodine atoms at 625 k with a first-order rate constant of 0.271 s−1. part a part complete what is the half-life for this reaction?