I took in chemical lab experiment called(molecular mass of volatil liquid ) in this experiment they said we should make a hole in the aluminum foils by needle ... my question is why we should make a holl in the aluminum ?? #chemical​

What is the volume occupied by 10.0 dm3 of gas at standard pressure after it has been compressedat constant temputure to 500.0 kpa?

Why does the sun appear to be the brightest star in the sky? a- its apparent brightness is much greater than other stars. b- it burns more gas, making it brighter than any other star. c- it is the largest star in the galaxy, so it is the brightest star. d- its relative distance to earth is closer than the other stars.

Which formula can be used to calculate the molar mass of hydrogen peroxide