Achemist determined by measurements that 0.015 moles of iron participated in a chemical reaction. calculate the mass of iron that participated in the chemical reaction. round your answer to 2 significant digits.

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.

What happens when an acid dissolves?

Particle model to predict what will happen if a sharp object creates a hole in the soccer ball