MathDB

3

Part of 2013 National Chemistry Olympiad

Problems(1)

2013 USNCO Problem 3: Mass of compound

Source:

5/23/2013
What mass of the compound \ce{CrO3} (M = 100.0)\text{(M = 100.0)} contains 4.5×10234.5\times10^{23} oxygen atoms?
<spanclass=′latex−bold′>(A)</span>2.25 g<spanclass=′latex−bold′>(B)</span>12.0 g<spanclass=′latex−bold′>(C)</span>25.0 g<spanclass=′latex−bold′>(D)</span>75.0 g <span class='latex-bold'>(A) </span>\text{2.25 g}\qquad<span class='latex-bold'>(B) </span>\text{12.0 g}\qquad<span class='latex-bold'>(C) </span>\text{25.0 g}\qquad<span class='latex-bold'>(D) </span>\text{75.0 g}\qquad