Determine the mass in kilograms of each subatomic particle. Particle Mass (g)

Proton 1.6726 × 10^–24
Neutron 1.6749 × 10^–24
Electron 9.1093 × 10^–28

Agas is contained in a thick walled balloon when the pressure changes from 1.21 atm to 2.52 the volume changes from 3.75 l to 1.72 l and the temperature change from 293k to blank k

What is the percentage of hydrogen in nitrogen trihydride

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.)