Chemistry Answers

A bubble rises from the bottom of a lake 30m deep and is four times its original volume just before breaking the surface. If the temperature is constant and the pressure at the bottom of the lake is p, what is the pressure at the water surface? 

A bicycle pump of volume 72 cm3 is filled with air at a pressure of 0.1 MPa. The volume is reduced to 30 cm3. No air leaks from the pump and the temperature stays constant. Calculate the pressure of the compressed air. 

A helium filled balloon has a volume of 2.75 dm3 at 20.0°C. The volume of the balloon changes to 2.07 dm3 when placed outside on a cold day. What is the temperature outside in °C?

A fixed mass of gas at 35 0C exhibits a pressure of 12 atm and occupies a volume of 

65 cm3. 

(a) Use Boyle’s law to calculate the volume the gas will occupy at 35 0C if the pressure is 

increased to  45 atm. 

(b) Use Charles’s law to calculate the volume the gas will occupy if the temperature is 

increased to 135  0C while the pressure is held constant 

What is the concentration of a solution with a volume 3.3 mL that contains 12 grams of ammonium sulfite?

You are a NASA engineer. You are the chief engineer for the Apollo 13 mission to the moon. The astronauts are running out of oxygen and need to get rid of the excess carbon dioxide. You know that sodium hydroxide (NaOH) has been suggested as a means of removing carbon dioxide from the spacecraft cabin. The filter which they had been using is fully saturated and no longer works. You remember that the astronauts have a 5000. g container of sodium hydroxide on the ship. You also know that sodium hydroxide can be used to remove carbon dioxide.

Use the following reaction:  NaOH    +     CO2   →   Na2CO3    +    H2O

The astronauts have 2 days left before they land on Earth. You know that there are three astronauts, and each astronaut emits roughly 500. g Of carbon dioxide each day. Is there enough sodium hydroxide in the cabin to cleanse the cabin air of the carbon dioxide, or are the astronauts doomed?

a flask of 7l contains a mixture of 6g of o2 and 15g of n2 at 30°c.what is the partial pressure of the oxygen gas?

Bailey bought some of blue balloons for his birthday, the balloons inflated at the initial pressure of 1.70 atm, at that pressure the gas inside of it takes up 4.25L of volume, if Bailey increases the pressure to 2.40 atm, what will be the new volume?

Discuss the cause of acidity and alkalinity in the soil and their management

14.7 grams of sodium sulfate (Na2SO4) was dissolved in 3.15 L of water. Determine the Ion Concentration of the following elements inside the solution.

1.) Sodium (Na2)?

2.) Sulfur (S)?

3.) Oxygen (O4)?