Chemistry, 22.04.2020 04:27 genyjoannerubiera
Hydrogen fuel cells are a promising alternative to gasoline engines in part because they release water instead of carbon dioxide. In a hydrogen fuel cell, hydrogen gas (H2) and oxygen gas (02) react to make water as shown below. Which of the following statements is a true statement about how this reaction occurs? 2H2(g) + O2(g) → 2 H2O(g) A. A molecule of H2 and a molecule of o2 collide B. Two molecules of H2 and a molecule of O2 must collide at one time C. An O-H bond must break. D. An H-H bond must form E. The reactants must undergo a change of state for this reaction to occur
Answers: 2
Chemistry, 21.06.2019 22:30
200. ml of 3.00 m nacl solution is diluted to a final volume of 500. ml. what is the molarity of the final solution?
Answers: 2
Chemistry, 22.06.2019 16:50
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.
Answers: 1
Chemistry, 22.06.2019 18:30
You open a can of soda at room temperature and hear a hiss. which of the following factors has changed inside the container? a.) atmospheric pressure b.) temperature of gas c.) type of gas d.) amount of gas
Answers: 1
Hydrogen fuel cells are a promising alternative to gasoline engines in part because they release wat...
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