Suppose you had one mole of oxygen how many miles of hydrogen would react completely with the oxygen and how many moles of H2O would be produced

Harvey kept a balloon with a volume of 348 milliliters at 25.0˚c inside a freezer for a night.  when he took it out, its new volume was 322 milliliters, but its pressure was the same.  if the final temperature of the balloon is the same as the freezer’s, what is the temperature of the freezer? the temperature of the freezer is  kelvins.

Achef makes salad dressing by mixing oil, vinegar, and spices, as shown. which type of matter is the salad dressing?

When an object falls through the air and encounters air resistance its overall speed will be than if it had not encountered air resistance? (one word answer)