An arctic weather balloon is filled with 12.0 L of helium gas inside a prep shed. The temperature inside the shed is 15. °C. The balloon is then taken outside, where the temperature is -16. °C. Calculate the new volume of the balloon. You may assume the pressure on the balloon stays constant at exactly 1 atm. Be sure your answer has the correct number of significant digits. L x10 X

An arctic weather balloon is filled with 21.7 L of helium gas inside a prep shed. The temperature inside the shed is 9. °C. The balloon is then taken outside, where the temperature is -32. °C. Calculate the new volume of the balloon. You may assume the pressure on the balloon stays constant at exactly 1 atm. Round your answer to 3 significant digits. L ☐ X 3

Gaseous ethane CH3CH3 will react with gaseous oxygen O2 to produce gaseous carbon dioxide CO2 and gaseous water H2O. Suppose 19. g of ethane is mixed with 52.1 g of oxygen. Calculate the minimum mass of ethane that could be left over by the chemical reaction. Be sure your answer has the correct number of significant digits.

40 mL of oxygen gas at a temperature of 42 degrees Celsius is heated to 183 degrees Celsius. What is the new volume? Use 273 for the conversion of Celsius to Kelvin. Do not type units in your answer.

A marine biologist is preparing a deep-sea submersible for a dive. The sub stores breathing air under high pressure in a spherical air tank that measures 79.0 cm wide. The biologist estimates she will need 8600. L of air for the dive. Calculate the pressure to which this volume of air must be compressed in order to fit into the air tank. Write your answer in atmospheres. Be sure your answer has the correct number of significant digits.

A sample of helium gas occupies 0.475 L. What is this volume in cm3?

An arctic weather balloon is filled with 26.0 L of helium gas inside a prep shed. The temperature inside the shed is 15. °C. The balloon is then taken outside, where the temperature is -12. °C. Calculate the new volume of the balloon. You may assume the pressure on the balloon stays constant at exactly 1 atm. Be sure your answer has the correct number of significant digits. 0 x10 X Ś

A chemist makes 480. mL of copper(II) fluoride (CuF₂) working solution by adding distilled water to 200. mL of a 0.00713 M stock solution of copper(II) fluoride in water. Calculate the concentration of the chemist's working solution. Be sure your answer has the correct number of significant digits. M x10 X Ś

Convert 34.4 psi (ib/in squared ) to g/cm squared. Report to the nearest whole number (1 pound =453.6 grams, 1in=2.54 cm)

and gaseous Gaseous methane (CH4) will react with gaseous oxygen (O₂) to produce gaseous carbon dioxide (CO₂) water (H₂O). Suppose 0.80 g of methane is mixed with 1.22 g of oxygen. Calculate the maximum mass of carbon dioxide that could be produced by the chemical reaction. Round your answer to 3 significant digits. g x10 X Ś