posted by .

How do you find molar mass?

  • Chemistry -

    Look up the atomic masses on the periodic table OR look in a table for the elements. An example:
    Ca = approximately 40
    C = approximately 12
    O = approximately 16 and 16 x 3 = 48.
    Then add all of them.
    40 + 12 + 48 = approximately 100. I just rounded all of them to make it a little easier for you to see.
    Here is a table on the web if you don't have one.

  • Chemistry -

    Thank you! but what about for a molar mass for a single element? my teacher said it is different from the atomic mass, but all the research i've done says it is not different.

  • Chemistry -

    You are right. Atomic masses are the masses you see in the table or on the periodic chart. I suspect your teacher is talking about the molar mass of elements that are diatomic; i.e., two or more atoms to the molecule. For example, O2 is oxygen = 32 (16 x 2)
    O3 is ozone = 48 (16 x 3)
    N2, F2, Cl2, Br2, I2, H2, are done the same way. P is P4 and S is S8 in the elemental state. I think most, if not all, of the remaining elements are single atoms to the molecule.

  • Chemistry -

    I should have said "polyatomic" or "multiatomic" instead of diatomic. N2, I2, H2, and most of the others I listed are diatomic. Of course, you realize O3, ozone, is triatomic, P4 is tetratomic, and S8 is what? Octatomic?

  • Chemistry -

    Oh Okay. I get it!! thank you so much!!

  • Chemistry -

    You're quite welcome. Glad to be of help.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    which of the following compounds contains the lowest percentage by mass of nitrogen?
  2. CHemistry....Please help

    1.SOLUBILITY: At 25C, the molar solubility of calcium phosphate in water is 1.1*10^{-7}M. Calculate the solubility in grams per liter. I m not sure how to convert M to g/L MOLAR MASS OF COLLIGATIVE PROPERTIES: 2.tert-Butyl alcohol …
  3. Chemistry

    Calculate the molar masses of copper (II) nitrate trihydrate and of the precipitate formed by this reaction. Are these steps right?
  4. Molar Mass Question

    Hello, I have been asked to find the molar mass of ferrous ammonium sulfate [ NH4]2[Fe][SO4]2·6H2O] would i consider the molar mass of the water as well, why or why not?
  5. Chemistry

    Consider the equation: A + 4B=3C+3D, when equal masses of A and B are reacted, which is limiting?
  6. chemistry

    How many grams of calcium nitrate (molar mass = 164 g) would be formed if 0.500 g of calcium chloride (molar mass = 111 g) were reacted with an excess of silver nitrate (molar mass = 170. g
  7. Chemistry 11

    A hydrate of zinc chlorate, Zn(ClO3)2 .xH2O(s) contains 21.5% zinc by mass. Find the value of x. What I've done: Molar mass of Zn: 65.409 g/mol Molar mass of Cl: 2*35.453 =70.906 g/mol Molar mass of O: 6*15.9994 =95.9964 g/mol Total …
  8. chemistry

    N2(g) + 3 H2(g) → 2 NH3(g) [balanced] If 5.42 g of nitrogen gas are reacted with 5.42 g of hydrogen gas, which of the reactants is the limiting reactant?
  9. Chemistry

    N2(g) + 3 H2(g) → 2 NH3(g) [balanced] If 5.42 g of nitrogen gas are reacted with 5.42 g of hydrogen gas, which of the reactants is the limiting reactant?
  10. Chemistry

    "Hi there! So I have a chemistry project due in a few hours. I need to find the molar mass of a specific antacid tablet, but all I know is that the tablet is made up of 550mg CaCO3 and 110mg Mg(OH)2 I also know that the tablet has …

More Similar Questions