If 100 cc oxygen contains Y molecules, how many molecules of nitrogen will be present in 50 cc of nitrogen under the same conditions of temperature and pressure?

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Solution

Calculate number of moles of gas using ideal gas equation (assuming STP):
pV = nRT
n = pV/RT
n = 1100/0.0821273
n = 4.46
Converting moles to molecules:
4.46 * 6.02310^23
= 26.86 10^23 molecules

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If 100 cc oxygen contains Y molecules, how many molecules of nitrogen will be present in 50 cc of nitrogen under the same conditions of temperature and pressure?

Calculate number of moles of gas using ideal gas equation (assuming STP):pV = nRTn = pV/RTn = 1*100/0.0821*273n = 4.46Converting moles to molecules:4.46 * 6.023*10^23= 26.86 * 10^23 molecules

Calculate number of moles of gas using ideal gas equation (assuming STP):
pV = nRT
n = pV/RT
n = 1100/0.0821273
n = 4.46
Converting moles to molecules:
4.46 * 6.02310^23
= 26.86 10^23 molecules