Can I please have help understanding this question? I would really appreciate it. Thanks! A gas cylinder contains 4 x 10^4 cm^3 of hydrogen at a pressure of 2.50 Pa and a temperature of 290K, the cylinder is used to fill balloons. Each balloon when filled contains 7.24 x 10^3 cm^3 of hydrogen at a pressure of 1.85 x 10^5 Pa and a temperature of 290K, calculate the number of balloons that can be filled. (The answer is 741 but I dont understanf the method and concept.)

To create electromagnetic induction, which of the following has to move? a. a wire b. a magnet c. a transformer d. either a or b

How do the measurements of charge at the different locations on the sphere compare to each other? the charge measurements are different at all locations on the sphere. the charge measurements are virtually not the same at all locations on the sphere except for the charge at the very top and at the very bottom that are equal. the charge measurements are virtually the same at all locations on the sphere except for the charge at the very top. at the top, the conductive sphere has a small disk that is made of different material. the charge measurements are the same at all locations on the sphere. what happens to the charge on the conductive sphere when it is connected to a source of charge such as the electrostatic voltage source? nothing will happen because no charge goes around the surface of the sphere. the charge on the conductive sphere spreads out over the surface of the sphere; being greater in some specific locations on the sphere. the charge on the conductive sphere spreads out uniformly over the surface of the sphere. the charge on the conductive sphere spreads out non-uniformly over the surface of the sphere.

What are atoms of the same element with varying number of neutrons