6. The equation for a reaction occurring in the synthesis of methanol is co2 + 3

Question

6. The equation for a reaction occurring in the synthesis of methanol is co2 + 3H2 CH3OH + H2O What is the maximum amount of methanol that can be formed from 2 mol of carbon dioxide and 3 mol of hydrogen? A 1 mol C. 3 mol B. 2 mol D. 5 mol 7. Under what conditions would one mole of methane gas, CH4, occupy the smallest volume? A 273 K and 1.01 103 Pa B. 273 K and 2.02x103 Pa C. 546 K and 1.01 10' Pa D. 546 K and 2.02x10 Pa analysed (a) A was found to contain 54.5% C and 91% H by mass, the remainder being oxygen. 8. An organic compound, A, containing only the elements carbon, hydrogen and oxygen was Determine the empirical formula of the compound. (b) A 0230 g sample of A, when vaporized, had a volume of 0.0785 dm at 9s°C and 102 kPa. Determine the relative molecular mass of A. (c) Determine the molecular formula of A using your answers from parts (a) and (b)

Explanation / Answer

Ans 6 : A) 1 mol

One mole of carbon dioxide requires 3 moles of H2 to make one mole of methanol in a well balanced complete reaction

So 2 mol of CO2 will require : 2 x 3 = 6 mol of H2

Since we have only 3 mol of H2 , so H2 is the limiting reagent.

So then 3 mol of H2 will make 1 mol of methanol.

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