Chemistry

Please check my answers for the following questions. THANK YOU.

1) The empirical formula of a compound that is 25.9% nitrogen and 74.1% oxygen is....
ANSWER: N2O


2) empirical formula of a compound that consists of 4.80 grams of carbon, 1.20 grams of hydrogen, and 2.80 grams of nitrogen is...
Answer: C2H6N


3)empirical formula of a substance composed of 3.05% carbon, 0.26% hydrogen, and 96.69% iodine is...
ANSWER: CHI3


4) Symclosene has an empirical formula of CClNO and a molecular mass of 232.42 u. What is the molecular formula of symclosene?
ANSWER: C3Cl3N3O3


5) Empirical formula of a compound is C2H3O. The gram formula mass of the compound is 172g. What is the molecular formula?
ANSWER: C8H12O4


6) The molecular formula of a given compound is C4H10. The empirical formula of the same compound would be:
ANSWER: C2H5

#2 through #6 are correct. #1 is not. Didn't you mean N2O5?

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  1. Please check my from the question i asked . (1) C=40.0g x
    1mole= 12.0g
    3.33moles
    H= 6.7g x
    1mole =1.0g
    6.7moles
    O=53.3g x
    1mole = 16.0g
    3.33moles
    mole ratio
    C = 3.33/3.33
    =1.00
    = 1
    H = 6.7/3.33
    = 2. 01
    = 2
    O = 3.33/3.33
    = 1.00
    = 1
    So, the empirical formular is CH2O

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