MathDB

9

Part of 2008 National Chemistry Olympiad

Problems(1)

2008 USNCO Local #9: Moles of oxygen gas

Source:

12/3/2012
How many moles of oxygen gas are produced by the decomposition of 245245 g of potassium chlorate?
\ce{2KClO3(s)} \rightarrow \ce{2KCl(s)} + \ce{3O2(g)}
Given: Molar Mass/ g⋅mol−1\text{g} \cdot \text{mol}^{-1} \ce{KClO3}: 122.6122.6
<spanclass=′latex−bold′>(A)</span>1.50<spanclass=′latex−bold′>(B)</span>2.00<spanclass=′latex−bold′>(C)</span>2.50<spanclass=′latex−bold′>(D)</span>3.00 <span class='latex-bold'>(A)</span>\hspace{.05in}1.50 \qquad<span class='latex-bold'>(B)</span>\hspace{.05in}2.00 \qquad<span class='latex-bold'>(C)</span>\hspace{.05in}2.50 \qquad<span class='latex-bold'>(D)</span>\hspace{.05in}3.00 \qquad