Shanti mixes 39 g of potassium with 39 g of chlorine. She chtains 74 g of potassium chloride and recovers 4
g of unreacted chlorine. Do Shanti's results confirm the law of conservation of mass? (SC.8.P.9.1)

No, because no potassium is left over.

Yes, because the mass of all the reactants is accounted for.

Yes, because all of the potassium reacted with the
chlorine.

No, because the mass of the potassium chloride is greater than the amount of potassium used.

it will increase due to the time span

the fossil record provides evidence of a common ancestor to many species.

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.

a scenario where a cell may be needed to perform a form of endocytosis is when transporting large molecules. a scenario where a cell may be needed to perform a form of exocytosis is when releasing the large molecule from the cell.