Answer
See the answer below.
Work Step by Step
a) At 100$°C$, boiling is taking place: bubbles of vapor are emerging from the liquid, so the glass will be slightly wet inside due to condensation to maintain the thermodynamic equilibrium.
b) Approximately 1 atm, since this is the normal boiling point of water.
c) Assuming all water is liquid:
$10\ g\div0.958\ g/cm^3=10.44\ cm^3$
d) Assuming water vapor behaves like an ideal gas:
$n=1\ atm×0.050\ L/((0.082)(373\ K))$
$n=0.00163\ mol$
Mass:
$0.00163\ mol×18.015\ g/mol=0.0294\ g$
