6) A spherical balloon of 21cm diameter is to be filled with hydrogen gas at NTP from a cylinder containing hydrogen gas at 20 atms and 27°C.
If the cylinder can hold 2.66 liters of water at NTP, calculate the
number of balloon that can be filled
up.​

100 grams of molten lead (600°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/g⋅°c; the latent heat of fusion and the melting point of lead are 2.45 × 104 j/kg and 327°c, respectively.)

Which aqueous solution of ki freezes at the lowest temperature? 1) 1 mol of ki in 500. g of water 2) 2 mol of ki in 500. g of water 3) 1 mol of ki in 1000. g of water 4) 2 mol of ki in 1000. g of water

A5.00 g of a in . g of at aa 5.00 g of b in . g of .?at .