How many grams are there in 0.250 moles of Ba(NO3)2?

How do scientists think that gravity affected the formation of our solar system?

Electrons are extremely important to what area of technology? a) anti-aging research b) household product development c) electronics d) drug discovery

For the reaction shown, calculate how many moles of no2 form when each of the following completely reacts. 2n2o5(g)→4no2(g)+o2(g) part a 1.0 mol n2o5 express your answer using two significant figures. nothing mol m o l request answer part b 5.4 mol n2o5 express your answer using two significant figures.