Is the concentration of a solution expressed by the number of moles of solute per kilogram of solvent?

Why are the average atomic masses of some of the elements in parentheses?

a sample of gas at 62 degrees C occupies a volume of 4.80 L at a pressure of 2.90 atm. how many moles of gas are comtained in the sample?

Propionoic acid, C3H6O2, reacting with methanol, CH4O, will produce C4H8O2 and water. If 70.0 g of propionoic acid and 60.0 g of methanol are reacted together, which one will be the limiting reactant? C3H6O2 + CH4O → C4H8O2 + H2O

Which two of Earth's spheres interact when the rainfall in a region increases after a volcanic eruption? Biosphere and geosphere Biosphere and hydrosphere Geosphere and cryosphere Geosphere andhydrosphere I need it for science class

A student measured the pH of four solutions. Which pH indicates the highest hydronium ion concentration? 3.2 7.0 9.1 12.4

Which is the most practical argument for the continued funding of space exploration? a) Space exploration will one day show whether life exists on other planets in star systems similar to ours.

33 protons 36 electrons 45 neutrons

The periodic table includes all of the known elements in the world. how are elements arranged on the periodic table?

The pOH of a solution is 13.28. What is the [OH]

If you can choose any animal in the world to be, what animal would you choose. (I'd be a wolf or a dog, mostly a wolf)