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A) compound a contains 3.153 g of oxygen per gram of carbon whereas compound b contains...
7. A compound contains 30.4 g of nitrogen and 69.6 g of oxygen by mass. What is the chemical formula of this compound? 8. How many molecules of H,O (M.w. 18 g/mol) are there in 355 grams of H,O? How many hydrogen atoms are in 355 grams of HO?
A 1.802 gram sample of unknown compound contains 0.721 grams of carbon, 0.121 grams of hydrogen and 0.960 grams of oxygen. The compound has a molar mass of 180.2 g/mol. Determine the empirical formula of the compound and the molecular formula. Show all work.
An unknown compound contains only carbon, hydrogen, and oxygen (CxHyOz). Combustion of 7.00 g of this compound produced 10.3 g of carbon dioxide and 4.20 g of water. Part A How many moles of carbon, C, were in the original sample? Express your answer to three significant figures and include the appropriate units. Part B How many moles of hydrogen, H, were in the original sample? Express your answer to three significant figures and include the appropriate units.
A compound contains only carbon, hydrogen, and oxygen. Combustion of 18.92 g of the compound yields 27.73 g of CO2 and 11.35 g of H2O. The molar mass of the compound is 90.078 g/mol. *Each part of this problem should be submitted separately to avoid losing your work* 1. Calculate the grams of carbon (C) in 18.92 g of the compound: grams 2. Calculate the grams of hydrogen (H) in 18.92 g of the compound. grams 3. Calculate the grams...
87.48 g of an unknown compound composed of carbon, hydrogen and oxygen contains 41.17 g C and 5.18 g H. Give the empirical formula of this compound. C4H5O2 C3H5O2 C3H5O4 C3H5O3 C4H6O3
Nitrogen forms a number of compounds with oxygen, for example nitrous oxide, N2O, is 6365% N by massA second compound, which contains two atoms of nitrogen per molecule, is 25.94 % N by mass. How many oxygen atoms are in the second compound?
1- Calculate the following: A- Number of moles in 10 gram of Cr(NO3). B- Number of Atoms in 10 gram of Cr(NO3). C- Number of molecules in 10 gram of Cr(NO3). D- Number of grams in 10 atoms of Cr(NO3). 2. Find the % composition of all individuals in, KBrO. %K= %Br= %0= 3. How many gram of Oxygen is in 10 gram of C (NO3),? 4- Find the empirical formula of a compound with the following composition Hg33.3% S...
5. (12 pts) A compound contains only carbon, hydrogen, and oxygen. If complete combustion of 70.86 g of this compound produces 103.9 g of CO2 and 42.52 g of H20, what is the molecular formula of this compound if it has a molar mass of 120.104 g/mol? (Carry each step to 3 digits after the decimal)
Constants | Periodic Tabl An unknown compound contains only carbon, hydrogen, and oxygen (C,H,O.). Combustion of 3.00 g of this compound produced 4.40 g of carbon dioxide and 1.80 g of water Part A How many moles of carbon C were in the original sample? Express your answer to three significant figures and include the appropriate units View Available Hint(s) Value Umits Submit Part B How many moles of hydrogen, H, were in the original sample? Express your answer to...
A compound containing sulfur and fluorine contains 8.00 g of S and 9.50 g of F. Which combination of S and F masses represents a different compound that obeys the Law of Multiple Proportions? Group of answer choices a. 4.00 g of S and 4.75 g of F b. 32.0 g of S and 38.0 g of F c. 8.00 g of S and 10.5 g of F d. 16.0 g of S and 57.0 g of F