1. In 75 seconds 400ml of oxygen diffuses through a glass tube. If It takes 25 seconds for 100 ml of a gas X to diffuse through the same tube under similar conditions, calculate the relative molecular mass of the gas X

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

Which statement best describes the liquid state of matter? a. it has definite shape but indefinite volume. b. it has definite shape and definite volume. c. it has indefinite shape and indefinite volume. d. it has indefinite shape but definite volume.

Which statement explains which thermometer is more appropriate to measure the temperature of a liquid at 43.6 degrees celsius a) thermometer a, because it measures temperature more accurately than thermometer b b) thermometer b, because it measures temperature more accurately than thermometer a c) thermometer a, because it measures temperature more precisely than thermometer b d) thermometer b, because it measures temperature more precisely than thermometer a