At what pressure does ethane (C₂H₆) have a density of 37.2 g/L at 66.2 °C?     ___atm?

1-at atmospheric pressure a sample of Ne gas gas a volume of 155mL at 32C degrees. What volume in milliliters will the Ne gas occupy if the temperature is decreased to 12C degrees while the pressure remains constant? 2-How many mL of 3.5 M HCL is needed to prepare 125 mL of 0.5 M HCL by dilution? 3-A gas has a volume of 1.71 liters at a temperature of 87C and pressure of 775 torr. What is the pressure of the gas when the volume is increased to 2.3L at a temperature of 367C? 4-calculate the concentration in % (m/m) of a solution containing 30.1 g of NaBr dissolved in 400.0g of H2O. 5-what is the boiling point of an aqueous solution that contains 0.795 moles of NaCl per one kg of water?

at what temerature does H2O have a density of 0.812 g/L at 1.17 atm

What is the volume in cubic meters (m3) if 58 moles of gas at 37oC has a pressure of 120,630. Pa? Note: In the answer, write the unit as m^3

At what pressure in atm does ethane (C₂H₆) have a density of 37.2 g/L at 35.4 °C?

At what pressure does butane (C4H10) have a density of 47.2 g/L at 39.5 °C?

At what temperature (in K) does uranium hexafluoride have a density of 0.9300 g/L at 0.5073 atm?

The gas of a certain volcano had the following composition in mole percent: 60.0% CO2, 28.0% H2, 7.40% HCl, 1.80% HF, 2.70% SO2, and 0.100% H2S.  What would be the partial pressure of  HF in atmospheres if the total pressure was 285 mmHg? 1atm = 760mmHg