22.4 dm^3 of each gas at stp has different mass but the same number of molecule. justify.
( kindly )

At STP, a given volume has the same number of moles. So, no. of moles= 22.4÷24= 0.93333mol (5 s.f.)

Number of molecules= no. of moles × 6×10^23 , which would give us the same number of molecules since the number of moles are the same.

However, mass of a gas depends on the mr of the gas.

This is because the formula for the mass of a gas is mole× mr.

Since different gases would have different mr, mass would differ.

sorry. my computer broke down and i had about 3 doctor's appointments. i'm just catching up now after reinstalling a router.

i think you best answer to this is d. some film directors were very picky about roles and lighting and and which side of the face the camera should catch. they were also picky about sound and background noise and chatter and music and all sorts of what we would consider trivial things. a stage director has to have all this ironed out before the curtain goes up. if he doesn't he better do it soon. if he doesn't notice, critics soon will, and they are not a very nice bunch.

e: both have the power to ask for rewrites. theater directors are always yammering about act 2.

c is true. both can ask for any number of things during rehearsals. the reason i wouldn't pick c is because a film director can make changes anytime during shooting, including when he thinks they ought to be done shooting.

b i didn't know what blocking was and i can't find a good description. if you have one and think b is true, go for it.

a a film director quite frequency chooses the leading lady or man. he may not have the final word, but he chooses. sometimes a theater director has no choice. a is generally not true.