The molecule pentaborane(9) (mol. mass 63.14) was once thought to be a candidate for rocket fuel.  It spontaneously reacts with O2(g) as shown below to generate high temperatures and expanding gaseous products.   2 B5H9(g)  +  12  O2(g)  →  5 B2O3(s)  +  9 H2O(g)   What pressure would build up in a 500. mL storage tank if 5.00 g of pentaborane reacted with excess O2(g) that leaked into the tank and the temperature increased to 400. °C?

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The molecule pentaborane(9) (mol. mass 63.14) was once thought to be a candidate for rocket fuel.  It spontaneously reacts with O2(g) as shown below to generate high temperatures and expanding gaseous products.

 

2 B5H9(g)  +  12  O2(g)  →  5 B2O3(s)  +  9 H2O(g)

 

What pressure would build up in a 500. mL storage tank if 5.00 g of pentaborane reacted with excess O2(g) that leaked into the tank and the temperature increased to 400. °C?  

 

 

 

 

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