0.096g of a liquid hydrocarbon was vaporized and it occupied 29.8cm^3 at 18°C and 750mm. Hg. On analysis the liquid was found to contain 92.3% of carbon. Calculate the relative molecular mass of the hydrocarbon

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

Ascientist measures the speed of sound in a monatomic gas to be 449 m/s at 20∘c. what is the molar mass of this gas?

Who discovered a pattern to the elements in 1869?