Which ions of (nh4)2so4 is dissolved in water.

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 ?

What is the chemical formula for the compound formed between sodium and flour one

Which compound most likely has the greatest bond energy?