A spherical glass container of unknown volume contains helium gas at 25°C and 1.950 atm. When a portion of the helium is withdrawn and adjusted to 1.00 atm at 23°C, it is found to have a volume of 1.55 cm3.

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  15. Chemistry

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  16. chem

    A spherical glass container of unknown volume contains helium gas at 25°C and 1.950 atm. When a portion of the helium is withdrawn and adjusted to 1.00 atm at 23°C, it is found to have a volume of 1.55 cm3. The gas remaining in the first container shows

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  18. HELLO I NEED HELP AND NOBODY EVER HELPS ME.

    1. the molar mass of helium is 4.00 g/mol. calculate the volume of 1 mol of helium at STP (T = 273, P = 1 atm) what is the density of helium at STP? 2. the density of an ideal gas is 1.35 kg/m^3. if the temperature is Kelvin and the pressure are both

  19. Chemistry

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  20. Chemistry

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  21. chemistry homework help!!

    many gases are shipped in high pressure containers. consider a steel tank whose volume is 42.0L and which contains O2 gas at a pressure of 165atm at 23 degrees celsius. 1.) what mass of O2 does the tank contain? 2.) what volume would the gas occupy at STP?

  22. chem

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  23. Physics

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  24. Chemistry

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  25. chemistry

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  26. chemistry

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  27. Chemistry

    A 1.44-g sample of an unknown pure gas occupies a volume of 0.336 L at a pressure of 1.00 atm and a temperature of 100.0 degrees Celsius. What is the unknown gas?

  28. Chemistry URGENT

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  29. Physics

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  31. Physics

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  32. AP Chem

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  33. chem

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  34. Chemistry

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  35. chem

    A balloon filled with 22.3 mol helium has a volume of 500. L at 0.0°C and 1.00 atm pressure. The temperature of the balloon is increased to 38.0°C as it expands to a volume of 570. L, the pressure remaining constant. Calculate q, w, and E for the helium

  36. pressure

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  37. Physics Urgent

    A container of volume V = 103 cm3 has a mass of 30.0042 g when evacuated. When the container is filed with an unknown gas of pressure p = 4.72 atm at temperature T = 20oC, the mass of the system increases to 30.9508 g. Assuming that the unknown gas behaves

  38. Chemistry

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  39. Physics

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  40. chemistry

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  41. chemistry

    4. A container of gas has a volume of 3.5 L and a pressure of 0.8 atm. Assuming the temperature remains constant, what volume of gas would result if the pressure was 0.5 atm? A. 1.8 L B. 5.6 L C. 0.2 L D. 2.2 L My guess is B but I just want to double check

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  43. science

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  44. physics

    A spherical balloon has a radius of 6.76 m and is filled with helium. How large a cargo can it lift, assuming that the skin and structure of the balloon have a mass of 950 kg? Neglect the buoyant force on the cargo volume itself.

  45. chem

    A spherical glass container of unknown volume contains helium gas at 25°C and 1.950 atm. When a portion of the helium is withdrawn and adjusted to 1.00 atm at 23°C, it is found to have a volume of 1.55 cm3. The gas remaining in the first container shows

  46. Chemistry 101 Q2

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  47. Physics Urgent

    A container of volume V = 103 cm3 has a mass of 30.0042 g when evacuated. When the container is filed with an unknown gas of pressure p = 4.72 atm at temperature T = 20oC, the mass of the system increases to 30.9508 g. Assuming that the unknown gas behaves

  48. Physics

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  49. Chem hw!

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  50. chemistry

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  52. Chemistry URGENT/DR BOB

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  54. Chemistry

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  55. physics

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  57. physics

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  59. university physics

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  60. Physic

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  61. chem

    A spherical glass container of unknown volume contains helium gas at 25°C and 1.950 atm. When a portion of the helium is withdrawn and adjusted to 1.00 atm at 23°C, it is found to have a volume of 1.55 cm3. The gas remaining in the first container shows

  62. chem plz help :(

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  63. Chemistry

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  64. Physics

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  65. Chemistry

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  66. Chemistry 101 Q 2

    An unknown amount of helium (He) gas occupies 10.5 L at 1.47 atm pressure and 321 K. What is the mass of helium gas in the container? Use R = 0.0821 L.atm/(mol.K). ____________ g He. Do NOT enter unit. Report your final answer with 3 SFs. I AM THE SAME

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  70. Chemistry

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  74. Intro to Chemistry

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  75. chem

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  76. chemistry

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  78. chemistry

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  79. Chemistry

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  80. chem

    3. Each of 2 front tires in the car is filled with a different gas. One tire contains 116 g of helium, another tire has 160 g of unknown gas. How many times heavier is a molecule of the unknown gas than an atom of helium?

  81. science

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  82. Chemistry

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  83. Chemistry

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  84. Chemistry

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  85. chemistry

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  86. chem

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  88. Science

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  90. Physics

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  91. physics

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  93. Science

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  95. chem

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