Water is composed of the same elements as hydrogen peroxide why do these substances have different properties

What pressure will be exerted by 0.675 moles of a gas at 25*c if it is in a 0.750-l container?

How many liters of water vapor can be produced if 108 grams of methane gas (ch4) are combusted at 312 k and 0.98 atm? show all work. pls ! will mark as brainliest

Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.