An unknown element as 2 isotopes. X-72 is 46.33% abundant and X-78 is 53.67% abundant. What is average atomic mass? Please round to two decimal places aka round to the nearest hundredth. NO UNIT

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Why is the vapor pressure of a warm lake higher than the vapor pressure of a cold lake? o a. warm water has a greater heat of vaporization. ob. warm water evaporates more quickly. cool water evaporates more quickly. od. cool water has a greater heat of vaporization.

Describe the particles of all three phases of matter in the root beer float. (how are the particles arranged and moving? )

A100-watt light bulb radiates energy at a rate of 100 j/s. (the watt, a unit of power or energy over time, is defined as 1 j/s.) if all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?