How long does it take for 1.5 L of F2 to effuse under the same conditions Submitted by Anonymous (not verified) on Tue, 10/28/2008 - 01:05 At a particular pressure and temperature, it takes 4.55 min for a 1.5-L sample of He to effuse through a porous membrane.

A mixture of CH4 and H2O is passed over a nickel catalyst at 1000 K. The emerging gas is collected in a 5.00 L flask and is found to contain 8.62 g of CO, 2.60 g of H2, 43.0 g of CH4, and 48.4 g of H2O. Assuming that equilibrium has been reached, calculate Kc and Kp for the reaction.

CO2(g) + 2H2O(l), what mass of methane (CH4) is required to react completely with 2.79 × 1024 molecules of O2? I have no idea where I should even start... Submitted by kingchemist on Tue, 06/16/2009 - 16:18

Did you mean pH values less than equal to or greater than 7? Also where did you get the 14 from?

2012年3月3日 · A piece of solid carbon dioxide, with a mass of 7.2 g, is placed in a 4.0-L otherwise empty container at 28°C. (a) What is the pressure in the container after all the carbon dioxide vaporizes? 1 atm

1) A 2.747 g sample of manganese metal is reacted with excess HCl (g) to produce 3.22 L of H2 (g) at 373 K and 0.951 atm, as well as a manganese chloride compound. What is the formula of the manganese chloride?

2012年2月28日 · Find moles CuSO4 from volume in L x molarity. From balanced equation 3 moles of CuSO4 make 1mole Al2(SO4)3. So find the number of moles made from the starting moles of CuSO4. Then find molairty = moles Al2(SO4)3/volume of solution in L