A 7.83-g sample of HCN contains 0.290 g of H and 4.06 g of N. Find...
Homework Answers
7.83 g - 0.290 g - 4.06 g = X grams of carbon
(X grams of carbon / 7.83 g) * 100% = mass % of carbon in sample
mass % of carbon in same * the mass of the sample (3.37g) = mass of carbon
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A 7.83-g sample of HCN contains 0.290 g of H and 4.06 g of N. Find...
Practice 1. A gas sample contains two elements, C and H. A 10.0-g sample of the...
Practice 1. A gas sample contains two elements, C and H. A 10.0-g sample of the gas contains 2.5 g Hand 7.5 g C. Calculate the mass percent of H and C
A 10.000 g sample of water contains 11.19% H by mass. what should be the %H...
A 10.000 g sample of water contains 11.19% H by mass. what should be the %H in a 20g sample of water. the answer is 11.19%, can you show the steps by stoichiometry
2. Consider a 4.0 L sample of gas contains 0.200 g H, 19.20 g 0, and...
2. Consider a 4.0 L sample of gas contains 0.200 g H, 19.20 g 0, and 17.60 g Co, at 65.2°C. a. Determine the mol fraction of carbon dioxide. b. Determine the total pressure of the gas sample in atm. c. Determine the partial pressure of hydrogen.
An herbicide contains only C , H , Cl , and N . The complete combustion...
An herbicide contains only C , H , Cl , and N . The complete combustion of a 125.0 mg sample of the herbicide in excess oxygen produced 130.7 mL of CO2 and 76.26 mL of H2O vapor at STP. A separate analysis determined the 125.0 mg sample contained 34.46 mg Cl . Determine the percent composition of the herbicide. percent carbon: % percent hydrogen: % percent chlorine: % percent nitrogen: % Determine the empirical formula of the herbicide. empirical...
Combustion analysis 12.01 g of an unknown sample, which contains only carbon, hydrogen and oxygen, produced...
Combustion analysis 12.01 g of an unknown sample, which
contains only carbon, hydrogen and oxygen, produced 14.08 g co2 and
4.32 h2o. Determine the empirical formula and molecular formula of
the unknown sample, while the molar mass for the unknown sample is
150.078 g/mol.
15 pts) Combustion analysis 12.01 g of an unknown sample, which contains only carbon, hydrogen, and oxygen, roduced 14.08 g CO2 and 4.32 g H20. Determine the empirical formula and molecular formula of the unknown sample,...
2) A 1.000 g sample of a hydrocarbon (which is a compound that contains only carbon...
2) A 1.000 g sample of a hydrocarbon (which is a compound that contains only carbon and hydrogen) was burned in oxygen, and the carbon dioxide and water produced were carefully collected and weighed. The mass of the carbon dioxide was 3.385 g, and the mass of the water was 0.692 g. What was the empirical formula of the hydrocarbon? A. C5H12 B. CsH6 C. CįH6 D. C H2 E. CįH star 1.00
uestion 23 of 34 > An herbicide contains only C, H, Cl, and N. The complete...
uestion 23 of 34 > An herbicide contains only C, H, Cl, and N. The complete combustion of a 275.0 mg sample of the herbicide in excess oxygen produced 287.6 mL. of CO2 and 167.8 mL of H,0 vapor at STP. A separate analysis determined the 275.0 mg sample contained 75.82 mg Cl. Determine the percent composition of the herbicide. percent carbon: % percent hydrogen: % percent chlorine: % narcant nitmnen. Question 23 of 34 > percent chlorine: % percent...
A 1.326 g sample contains only vitamin C (CHO) and sucralose (C,H,,C1,0). When the sample is...
A 1.326 g sample contains only vitamin C (CHO) and sucralose (C,H,,C1,0). When the sample is dissolved in water to a total volume of 31.1 mL, the osmotic pressure of the solution is 4.77 atm at 295 K. What is the mass percent of vitamin C and sucralose in the sample? vitamin C: sucralose:
H:C::N: H-C N: or Answer the following questions about the hydrogen cyanide, HCN, molecule. The central atom(s) a...
H:C::N: H-C N: or Answer the following questions about the hydrogen cyanide, HCN, molecule. The central atom(s) are [A] name of element(s). carbon A Moving to the next question prevents changes to this answer. Question 9 Answer the following questions about the hydrogen peroxide, H202, molecule. There are [A] double bonds in this molecule.
Determine the empirical formula for a compound that contains 15.0% C, 5.0% H, and 80.0% S...
Determine the empirical formula for a compound that contains 15.0% C, 5.0% H, and 80.0% S by mass. empirical formula: A 10.04 g sample of a compound contains 6.41 g of iron, Fe, 1.18 g of phosphorus, P, and oxygen, O. Calculate the empirical formula for the compound. empirical formula: What is the empirical formula of a compound composed of 3.25% hydrogen (H), 19.36% carbon (C), and 77.39% oxygen (0) by mass? Insert subscripts as needed. empirical formula: HCO
Practice 1. A gas sample contains two elements, C and H. A 10.0-g sample of the gas contains 2.5 g Hand 7.5 g C. Calculate the mass percent of H and C
2. Consider a 4.0 L sample of gas contains 0.200 g H, 19.20 g 0, and 17.60 g Co, at 65.2°C. a. Determine the mol fraction of carbon dioxide. b. Determine the total pressure of the gas sample in atm. c. Determine the partial pressure of hydrogen.
Combustion analysis 12.01 g of an unknown sample, which
contains only carbon, hydrogen and oxygen, produced 14.08 g co2 and
4.32 h2o. Determine the empirical formula and molecular formula of
the unknown sample, while the molar mass for the unknown sample is
150.078 g/mol.
15 pts) Combustion analysis 12.01 g of an unknown sample, which contains only carbon, hydrogen, and oxygen, roduced 14.08 g CO2 and 4.32 g H20. Determine the empirical formula and molecular formula of the unknown sample,...
2) A 1.000 g sample of a hydrocarbon (which is a compound that contains only carbon and hydrogen) was burned in oxygen, and the carbon dioxide and water produced were carefully collected and weighed. The mass of the carbon dioxide was 3.385 g, and the mass of the water was 0.692 g. What was the empirical formula of the hydrocarbon? A. C5H12 B. CsH6 C. CįH6 D. C H2 E. CįH star 1.00
uestion 23 of 34 > An herbicide contains only C, H, Cl, and N. The complete combustion of a 275.0 mg sample of the herbicide in excess oxygen produced 287.6 mL. of CO2 and 167.8 mL of H,0 vapor at STP. A separate analysis determined the 275.0 mg sample contained 75.82 mg Cl. Determine the percent composition of the herbicide. percent carbon: % percent hydrogen: % percent chlorine: % narcant nitmnen. Question 23 of 34 > percent chlorine: % percent...
A 1.326 g sample contains only vitamin C (CHO) and sucralose (C,H,,C1,0). When the sample is dissolved in water to a total volume of 31.1 mL, the osmotic pressure of the solution is 4.77 atm at 295 K. What is the mass percent of vitamin C and sucralose in the sample? vitamin C: sucralose:
H:C::N: H-C N: or Answer the following questions about the hydrogen cyanide, HCN, molecule. The central atom(s) are [A] name of element(s). carbon A Moving to the next question prevents changes to this answer. Question 9 Answer the following questions about the hydrogen peroxide, H202, molecule. There are [A] double bonds in this molecule.
Determine the empirical formula for a compound that contains 15.0% C, 5.0% H, and 80.0% S by mass. empirical formula: A 10.04 g sample of a compound contains 6.41 g of iron, Fe, 1.18 g of phosphorus, P, and oxygen, O. Calculate the empirical formula for the compound. empirical formula: What is the empirical formula of a compound composed of 3.25% hydrogen (H), 19.36% carbon (C), and 77.39% oxygen (0) by mass? Insert subscripts as needed. empirical formula: HCO
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