chemistry

posted by .

sometimes,instead of percentage composition, you will have the composition of a mass sample. using the actual mass of the sample, determine the empirical formula for compounds that have the following analyses.

b. a 13.07g sample of an unknown substance is composed of 9.48g of barium, 1.66g of carbon and 1.93g of nitrogen

c.0.0025 g sample of an unknown substance is composed of 0.0091g manganese, 0.0106g oxygen, and 0.0053 sulfur
c.

  • chemistry -

    They are done the same way. Convert grams to mols and find the ratio.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    The percentage of phosphourus in a detergent product may be determined by sample treatment including the precipitation of magnesium ammonium phosphate MgNH4PO4*6H2O (MW=245.41), using an excess of both magnesium and ammonium ions. …
  2. Chem

    Final question.. An alloy used in aircraft construction consists of aluminium, copper and magnesium. An 11.34g sample of alloy was treated with alkali to dissolve the aluminium, leaving a residue of mass 2.73g. This residue was treated …
  3. % Recovery

    How do you calculate percent recovery? I have this info: Weight of sample used: 0.198g Actual weight of sample: 0.325g Other info needed?
  4. ap chemistry

    18. Answer the following question that relate to the analysis of chemical compounds. (a) A compound containing the elements C, H, N, and O is analyzed. When a 1.2359g sample is burned in excess oxygen, 2.241g of CO2(g) is formed. The …
  5. Chemistry

    Sometimes, instead of percentages compostion, you will have the composition of a sample by mass. Using the actual mass of the sample, determine the empirical formula for compounds that have the following analyses. A. a .858g sample …
  6. chemistry

    1.to calculate the percent by massof an element in a known compound, divide the mass of the element in one mole by the _______and multiply by 100%. A(n) _______formula represents the lowest________ratio of the elements in a compound. …
  7. AP Chemistry

    An organic compound was synthesized and found to contain only C, H, N, O, and Cl. It was observed that when .150g sample of the compound was burned, it produced .138g of CO2 and .0566g of H2O. All the Nitrogen in a different .200g …
  8. chemistry

    you are given samples of two pure compounds, one of which is a gas and one of which is a liquid at room temperature. by elemental analysis, both compounds are found to have the following composition (by mass): 52% C 13% H 35% O (a) …
  9. chemistry

    help please, have no clue how to solve this. (a) you are given a mixture containing two compounds, A and B. both compounds have a solubility of 1g/100mL of solvent at 20 deg C and 16g/100mL of solvent at 100 deg C. The sample is composed …
  10. chemistry

    1. You are given a mixture containing two compounds, A and B. Both compounds have a solubility of 1 g/ 100 mL of solvent at 20 °C and 16 g/ 100 mL of solvent at 100 °C. The sample is composed of 3.5 g of A and 10 g of B. At 100 °C …

More Similar Questions