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20. What size container do you need to hole 0.0459 mol of N2 gas at STP?. 0.0459 mol * 22.4L = 1.03 L. 1 mol. 22. What volume in milliliters will 0.00922g of H2 gas occupy at STP?. 0.00922 g 1 mol = 0.00457 mol. 2.0 g. 0.00457 mol * 22.4 L = 0.102 L. 1 mol. or 102 mL. - PowerPoint PPT Presentation
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20. What size container do you need to hole 0.0459 mol of N2 gas at STP?
0.0459 mol *22.4L = 1.03 L1 mol
22. What volume in milliliters will 0.00922g of H2 gas occupy at STP?
0.00922 g 1 mol = 0.00457 mol 2.0 g
0.00457 mol* 22.4 L = 0.102 L
or 102 mL1 mol
24. Calculate the volume that 4.5kg of ethylene gas (C2H4) will occupy at STP.
¿𝟑 .𝟔 𝒙𝟏𝟎𝟑 𝑳
4.5𝑘𝑔𝑥1000𝑔1𝑘𝑔
𝑥1𝑚𝑜𝑙28.00𝑔
𝑥22.4 𝐿1𝑚𝑜𝑙
26. Determine the Celsius temperature of 2.49 mol of a gas contained in a 1.00-L vessel at a pressure of 143 kPa.
143𝑘𝑃𝑎 𝑥1.00𝑎𝑡𝑚101.3𝑘𝑃𝑎 ¿1.41𝑎𝑡𝑚
𝑇=(1.41𝑎𝑡𝑚 ) (1.00𝐿 )
(2.49𝑚𝑜𝑙 )(0.0821 𝐿∗𝑎𝑡𝑚𝑚𝑜𝑙∗𝐾
)¿6.90𝐾
6.90𝐾−273¿−𝟐𝟔𝟔℃
27. Calculate the volume of a 0.323-mol sample of a gas at 265 K and 0.900 atm.
¿𝟕 .𝟖𝟏𝑳
28. What is the pressure, in atmospheres, of a 0.108-mol sample of helium gas at a temperature of 20.0 oC if its volume is 0.505 L
𝑇=20.0℃+273¿293𝐾
𝑃=(0.108𝑚𝑜𝑙 )(0.0821 𝐿∗𝑎𝑡𝑚𝑚𝑜𝑙∗𝐾 )(293𝐾 )
0.505𝐿
¿𝟓 .𝟏𝟒𝒂𝒕𝒎
29. If the pressure exerted by a gas at 25 oC in a volume of 0.044 L is 3.81 atm how many moles of gas are present?
¿𝟔 .𝟗 𝒙𝟏𝟎−𝟑𝒎𝒐𝒍
𝑛=(3.81𝑎𝑡𝑚 )(0.44𝐿)
(0.0821 𝐿∗𝑎𝑡𝑚𝑚𝑜𝑙∗𝐾 )(298𝐾 )