A helium-filled weather balloon has a volume of 721 L at 19.9 °C and 751 mmHg. It is released and rises to an altitude of 7.75 km, where the pressure is 332 mmHg and the temperature is -29.1 °C. The volume of the balloon at this altitude is L.

Asap! will give brainiest when a heat wave strikes a region causing more people to run air-conditioning units, electrical demand increases. what needs to be done to meet this increased demand? raising the control rodslowering the control rodsremoving the control rods

If you try to move a piano and are unable to move it, did you perform any work in the scientific sense of the word? yes or no?

How many moles of oxygens atoms are present in 5.00 mol of diphosphorus of fe2(so4)3