2) A container has an unknown quantity of gas at a pressure of 61.6 kPa, a volume of 3.9 liters, and a temperature of 90 °C, how many moles of gas do I have?
3) A container has 23 moles of gas in a container with a volume of 500 liters and at a temperature of 298 K, what
is the pressure inside the container?
4) A barrel has 19 moles of gas at a pressure of 20.5 atm and at a temperature of 25 °C, what is the volume of the
container that the gas is in?

Which of the following is true about a carbonated soft drink? . the carbon dioxide is the solvent, and water is the solute.. the water is the solution, and carbon dioxide is the solvent.. the carbon dioxide is the solution, and the water is the solvent.. the water is the solvent, and the carbon dioxide is the solute.. .

Can anyone explain 1. review your spectrometry data and use the known elements to identify the star's composition. which unknown elements make up this star? justify your element selections. 2. in parts i and ii of the lab, what happened to the electrons of each element to produce the different colors of light? explain your answers using important terms from the lesson and information provided in the laboratory. 3. stars composed of heavier (more massive) elements are often slightly older than stars made predominantly from hydrogen and helium. based on your data, is the newly discovered star a younger star? explain your answer.

Question 2 (5 points) which of the following materials is useful for making molds because it has a low melting point? question 2 options: wood metal wax sand