How many moles of h2 gas would be contained in 4.00 of the gas at 202.6kpa and 127c?

Answer : The volume of one mole of gas is dependent of temperature and pressure.

At 0oCand1atm one mole of an ideal gas would be ≈22.4L, which is the same as 22.4dm3

If you double the pressure, the same amount (mole) of gas would take up only half the space.

If the temperature changes (and pressure stays constant), the gas will expand or contract by about 1%/3o.

a coal burning power plant

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.