To determine molecular mass O add the mass of each atom, but never count the same atom more than once.
O read the problem, it is always the amount given.
O convert to moles.
O add the mass of each atom in a molecule.

Atank contains 240 liters of fluid in which 10 grams of salt is dissolved. brine containing 1 gram of salt per liter is then pumped into the tank at a rate of 6 l/min; the well-mixed solution is pumped out at the same rate. find the number a(t) of grams of salt in the tank at time t.

Which function is performed by earths atmosphere? a. ultraviolet rays are prevented from reaching the ozone layer. b. earths temperature is raised and moderated by trapping in heat c. charged particles from the sun are prevented from reaching earth. d. magnetic charges from space are prevented from reaching earths surface.

The p sub shell can hold up to 8 electrons in an atom. true or false?