Which of the following changes can alter the form of a substance but does not necessarily change it to the other substance? a. physical changes b. pressure changes c. phase changes d. all of the above

How many moles are equivalent to 55.5g of nano3

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.

Neils bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from