During the electrolysis of an aqueous solution of sodium nitrate, a gas forms at the anode, what gas is it? A. Oxygen B. Hydrogen C. Sodium D. Water

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.

Embryos of different species look very similar, which shows that the organisms share a ancestor.

The atoms of a solid aluminum can are close together, vibrating in a rigid structure. if the can is warmed up on a hot plate, what happens to the atoms?