One light year is about 9 trillion kilometers. arcturus is a star that is 37 light years from earth. if you are about 11 years old now, how old will you be when light that is leaving arcturus today reaches earth? how far, in kilometers, will it have traveled?

What are transitions between a liquid and a solid called? identify which way they are transitioning

Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. in the first step, nitrogen and hydrogen react to form ammonia: (g) (g) (g) in the second step, ammonia and oxygen react to form nitric acid and water: (g) (g) (g) (g) calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .

If there are 3.5 moles of koh, how many moles of naoh can be produced? question 1 options: a)3.0 moles naoh b)3.5 moles naoh c)1 moles naoh d)9 moles naoh