A 250-mL flask COL water is 378.26 g, wl 17 い5、 388.86 119,28 258.9- 258.9 What is the volum 286.7 K is 246.7 mi

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sorry for the bad photo, but #6 is the one I need help with
5. A 250-mL flask containing air has a mass of 119.2861 g. If the mass of the flask filled with
water is 378.26 g, what iş the volume of air in the flask? (density of water = 0.9975 g/mL)
388.8
-119.28 €e l
258.9739
258.97399 fo.aa75y
259.6mL
ImL
6. What is the volume of a gas at standard conditions (STP) if the volume at 1.014 atm and
286.7 K is 246.7 mL?
286.7 K
246,7mL
1.014 atm
7. Assuming natural gas was entirely methane (CH4), what would the density be at standard
16.03 g/mol)
of methane=
Transcribed Image Text:5. A 250-mL flask containing air has a mass of 119.2861 g. If the mass of the flask filled with water is 378.26 g, what iş the volume of air in the flask? (density of water = 0.9975 g/mL) 388.8 -119.28 €e l 258.9739 258.97399 fo.aa75y 259.6mL ImL 6. What is the volume of a gas at standard conditions (STP) if the volume at 1.014 atm and 286.7 K is 246.7 mL? 286.7 K 246,7mL 1.014 atm 7. Assuming natural gas was entirely methane (CH4), what would the density be at standard 16.03 g/mol) of methane=
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