Sandra R.
asked • 03/20/20How many molecules of hydrogen are in 67.2L of H2 at STP?
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1 Expert Answer
Key is knowing that, at STP, all ideal gases occupy 22.4 liters/ mole:
67,2 liters * 1 mole/22.4 liters = 3
As a matter of fact, on standardized tests, they often use funky number like, 11.2, 22.4, 44.8 and 67.2 liters so that things work out "nicely"
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Sandra R.
Use NA=6.022×1023mol−1 for Avogadro's number. Your answer should have three significant figures. (Round to two decimal places in scientific notation.)03/20/20