Decomposition of CH4 produces carbon (C) and hydrogen (H) in mass ratio of 3.00:1.00. How much hydrogen can be made from decomposition of 10.0 g of CH4?​

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.

In the 1800s, one of the statements in john dalton's atomic theory was that atoms are indivisible. later experimental evidence led to the discovery of subatomic particles such as neutrons, electrons, and protons. what happened to the indivisible atom part of dalton's atomic theory, and why?

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.