No guessing i had to type this all out. how do oceanographers define saltanily?
a. number of milligrams of dissolved sodium chloride per millimeter of water.
b. number of grams of dissolved sulfur per kilogram of water.
c. number of grams of minerals per liter of water.
d. number of grams of salt per kilometer of water.

Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.

How many moles are in 43.9 l of oxygen

How many moles of lead are in 1.50 x 10^12 atoms of lead? could you explain the answer as well and not just give it to me i am refreshing for finals and i need to know how to do it