The correct equation for the combustion of boron is: 4b + 3o2 arrow 2b2o3.
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Why do sodium and neon have vastly different chemical and physical properties despite having similar atomic masses?

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?

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?