Lithium, the number-three element on the periodic table, has a mass that is twice that of hydrogen. true or false?

If 10.g of agno3 is available, what volume of 0.25 m agno3 can be prepared

What happens when light is scattered?

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 ?