How many oxygen molecules are present in 113.97 liters of oxygen gas at STP?

1 Answer
anor277
May 17, 2016

Approx. #5xxN_A" oxygen molecules where "N_A = "Avogadro's Number"#,

Explanation:

#"Moles of dioxygen "=(113.97*L)/(22.41*L*mol^-1#; here we use the molar volume to give us an answer in moles. Then we simply multiply this number by #N_A#, #"Avogadro's Number"#:

#"Number of dioxygen molecules"=(113.97*L)/(22.41*L*mol^-1)xx6.022xx10^23*mol^-1=??#;.

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