Astudent designs an ammeter (a device that measures electrical current) that is based on the electrolysis of water into hydrogen and oxygen gases. when electrical current of unknown magnitude is run through the device for 2.00 min , 12.4 ml of water-saturated h2(g) is collected. the temperature and pressure of the system are 25 ∘c and 715 torr. part a how many moles of hydrogen gas are produced? express your answer to three significant figures and include the appropriate units.

The earth's moon is unusually large. two popular theories of the moon's origin include the "sister world" hypothesis, which states that the moon formed from the same materials as the earth, near enough to the earth that they fell into orbit around each other. a second theory is the "capture" hypothesis, in which the moon formed elsewhere in the solar system, and the earth's gravity pulled it into its orbit. studies of what the moon is made of indicate that some of its materials had to come from the earth or from the same area of the solar system where the earth had formed. at the same time, the moon does not contain much of the material that makes up the earth's core, so the moon could not have formed from the same materials as the earth. how do the two facts above affect the described theories of the moon's origin? a. they show that scientists will never agree on where the moon came from. b. they show that more experiments on moon formation need to be done. c. they show that no theory accounts for the existence of the moon. d. they show that neither theory is complete and entirely correct.

An electrons position cannot be known precisely only it's probability of being in a certain location can be known

The pressure in a fluid is affected by which characteristics of that fluid