When 1.008 g of hydrogen gas reacts with chlorine gas in a calorimeter containing 500.00 g of water, the temperature rises from 25.00 °C to 29.24 °C. What is the enthalpy of the reaction in J/mol?

Determine the number o moles of ions/atoms/particle in the following: 2.50 miles of k2s (let me know how to do)

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?

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.