A sample of CO2 gas has a volume of 12.0 L at STP. Calculate the number of moles of CO2 in the sample.

The number of moles of CO2 is 0,54

Explanation:

We use the formula PV=nRT. The conditions of STP are 1 atm of pressure and 273 K of temperature.

PV=nRT  n=PV/RT

n=1 atm x 12 L/0,082 l atm/K mol x 273K

n=0,536049316 moles

8

explanation:

each principal energy level above the first contains one s orbital and three p orbitals. a set of three p orbitals, called the p sublevel, can hold a maximum of six electrons. therefore, the second level can contain a maximum of eight electrons - that is, two in the s orbital and 6 in the three p orbitals.

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