A candy scientist was trying

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?

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 ?

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false