is this correct?

"Synthesis gas" is a mixture of carbon monoxide and water vapor. At high temperature synthesis gas will form carbon dioxide and hydrogen, and in fact this reaction is one of the ways hydrogen is made industrially. A chemical engineer studying this reaction filis a 75L tank with 6.0 mol of carbon monoxide gas and 5.0 mol of water vapor. When the mixture has come to equlibrium-she determines that it contains 2.1 mol of carbon monoxide gas, 1.1 mol of water vapor and 3.9 mol of hydrogen gas. The engineer then adds another 3.0 mol of water, and allows the moture to come to equilibrlum again, Calculate the moles of carbon dioxide after equilibrium is reached the second time. Round your answer to 2 significant digits