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1. ### How to weigh gasses that are less dense than air?

... increase in weight is the weight of that extra gas. Which, at STP, would have a volume equal to the volume of the box itself.

3 Answers · Science & Mathematics · 28/04/2014

2. ### Question about the index of refraction, n=c/v?

...67c) PS speed of light in a vacuum = c. n for a vacuum = c/c = 1 n for air at STP = 1.000277

2 Answers · Science & Mathematics · 13/04/2014

3. ### If we suppose that a party balloon has a diameter of 16cm, how many balloons can lift a 75 kg man?

...volume) and that they are filled with a lighter gas than air at STP (say Helium). A spherical balloon of diameter D will have volume 1...

1 Answers · Science & Mathematics · 29/03/2014

4. ### what is the volume of 1 kg air at .76m Hg and 0°c?

rho = absolute pressure / ( 287.058 * 273) = 101.325 / 287.058 * 273 = 0.00129295768 Air @ STP = 1.2754 kg.m^3 So answer is: 1.292957 / 1.2754 = 1.0137664117626431701973288290205 cubic meters

1 Answers · Science & Mathematics · 16/03/2014

density of hydrogen at stp is ρ = 0.0899 kg/m³ V = m / ρ V = 18000 / 0.0899 V = 200(10³) m³

3 Answers · Science & Mathematics · 21/02/2014

6. ### Archimedes principle..Need help?

...of 227 L of air (in this case, pure N2, molar mass = 28.013 g/mol) at STP PV = nRT n = PV / RT = (1 atm)(227 L) / (0.0821...

4 Answers · Science & Mathematics · 04/02/2014

7. ### What is the total force on the bottom of a swimming pool 21.5m by 6.8m whose uniform depth is 1.9m ?

...fresh water = 1,000kg/m^3. G figure used = 9.8. Air pressure at STP = 101,325Pa.

1 Answers · Science & Mathematics · 01/02/2014

8. ### What volume would be occupied at STP conditions by 2 moles of Radioactive Kr-85 gas? What would be the mass of?

@ STP 1 mole occupies 22.4 L 2 moles= 44.8 L mole= mass/molec. wt. 2= mass/85 mass= 170 g

1 Answers · Science & Mathematics · 01/02/2014

9. ### If 3.50m3 of a gas initially at STP is placed under a pressure of 4.80atm (PHYSICS HELP PLEASE!!)?

(3.50 m^3) x (1.00 atm / 4.80 atm) x ((48.0 + 273 K) / 273 K) = 0.857 m^3

1 Answers · Science & Mathematics · 16/12/2013

10. ### A gas cylinder that contains argon has an internal volume of 43.8 L. A pressure gauge attached to the cylinder?

At STP CO occupies 22.414 L/mol. CO has a molar mass of 28.01021 g/mol. (28.01021 g/mol) / (22.414 L/mol) = 1.2497 g/L

1 Answers · Science & Mathematics · 11/12/2013