Calculate the molecules/cm3 AND moles/L concentration of the following samples: Show work a) 15 ppm O3...

Question

Question

Calculate the molecules/cm3 AND moles/L concentration of the following samples: Show work

a) 15 ppm O3 at 732 mmHg and 25.0 C

b) 23 ppb NO at 748 mmHg and 21.0 C

Answer 1

Answer #1

we will use conversions : 1 L= 10³ cm³ 1 atm = 760 mm of Hg and

moles = mass/molecular weight , 1 mole = N_A molecules or atoms, N_A= 6.023 * 10²³

^{ppm = parts per million and ppb = parts per
billion}

α) 15ppm : 15 in 101 gham ne, 1 Velume 7 95 L 7.95 x 1o c Ow », 0.313 mele = NA × 0.313 о-24 xlo2on.de calw, = з

b) 23 ppb 23 in 103 gham x748 - 0 94- atm 160 no. et melis el No 14+16 no et molsculs in 0-77 huslus 21 o 2.3 18.89 xIo

a) m hneees / L 0.313/795 18 99 04 mus

Answer 2

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