I don’t understand, what does that say in english?
0.326 moles of gas
Explanation:
Knowing the volume of a gas at standard temperature and pressure (STP) we may calculate the number of moles of the gas using the following formula:
number of moles = volume / 22.4 (L /mole)
number of moles of gas = 7.3 (L) / 22.4 (L /mole)
number of moles of gas = 0.326 moles
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molar volume
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A neutral sodium atom, for example, contains 11 protons and 11 electrons. By removing an electron from this atom we get a positively charged Na+ ion that has a net charge of +1. Atoms that gain extra electrons become negatively charged. A neutral chlorine atom, for example, contains 17 protons and 17 electrons.
The given speed is 251 cm/s
We are asked to convert the speed into the units of inches per minute.
The conversion factor between inches and centimeters will be:
1 in = 2.54 cm or 
The conversion factor between seconds and minutes will be:
1 minute = 60 seconds or 
Converting from cm/s to in/min:
Therefore, the speed of 251 cm/s will be equivalent to 
