Calculate the percent by weight of sodium (Na) and chlorine (Cl) in sodium chloride (NaCl) Calculate the molecular mass (MM): MM = 22.99 + 35.45 = 58.44 ; Calculate the total mass of Na present: ... a 1.00 g sample of which of the following contains the greatest mass of oxygen? a 1.00 g sample of which of the following contains the greatest mass of oxygen? b. nitrite. A compound having an approximate molar mass of 165−170 g has the following percentage composition by mass: carbon, 42.87%; hydrogen, 3.598%; oxygen, 28.55%; nitrogen, 25.00%. This quiz is designed to test your knowledge on the chemical elements and as a result calculation of percent composition of chemical compounds. The mass of Carbon in that compound would be 48 grams (12 X 4), so the percent carbon (by mass) would be 48/58 X 100 = 83%. We can't tell. Molar mass of SO3 = 80.0632 g/mol. Which of the following has the greatest percent by mass of oxygen? = Percent Composition: Total mass of compound (Whole) Example 1. Correct answers: 1 question: A230 g sample of a compound contains 136.6 g of carbon, 26.4 g of hydrogen, and 31.8 g of nitrogen. (b) If You Had 50.0 G Of Each Compound Which One Would Have The Greatest Number Of Oxygen Atoms? Given the total mass of the compound, we can determine directly the amount of oxygen from the determined masses of other elements, carbon, hydrogen, and nitrogen. b. chromate. The percent composition is used to describe the percentage of each element in a compound. The moles of each element must be determined. So, we have 4.447 moles of oxygen in our sample. If the compound’s molecular mass is determined to be 180 amu, this indicates that molecules of this compound contain six times the number of atoms represented in the empirical formula: 2 4 cal/g. You have to calculate the mass of strontium and the mass of the compound, for each of the four compounds, and compute the percent: percent of strontium = (mass of strontium / mass of the chemical formula) × 100 %. A compound has the empirical formula CH and a molecular mass of 78. 3 - Arrange the following substances in order of... Ch. The percent composition can be found by dividing the mass of each component by total mass. 1) C2H2 2) C3H3 3) C4H4 4) C6H6 34. Molecular weight calculation: 32.065 + 15.9994*3 ›› Percent composition by element. Ch. 40% Solve the problem by first finding the ratio of the mass of oxygen to the mass of the compound; then multiply by 100. Ascorbic acid (vitamin C) contains only C, H, and O. Which contains the greatest mass of oxygen: 0.75 mol of ethanol (C 2 H 5 OH), 0.60 mol of formic acid (HCO 2 H), or 1.0 mol of water (H 2 O)? 100% - 40.9% - 4.5% = 54.6% is Oxygen 3 - In 1987 the first substance to act as a... Ch. Convert grams SO3 to moles or moles SO3 to grams. This compound contains 1.6 grams of X atoms for every 3.8 grams of fluorine atoms. The empirical formula of a compound represents the lowest whole number ratio of the elements in it. 3 % Calculate the empirical formula of this compound. A gaseous compound containing carbon and hydrogen was analyzed and found to cons ist of between 80 and 90 percent carbon by mass. These are the atomic masses of the elements that you have to use: Atomic mass of Sr: 87.62 g/mol. Atomic mass of Cl: 35.453 g/mol Similarly, the molar mass of oxygen is 15.99. 3 - Calculate the percent composition by mass of the... Ch. Physics. This compound is also known as Sulfur Trioxide. The mass of oxygen is 115 g - (13.2+68.3+15.9) g which is 17.6 g oxygen. First we need to calculate the mass percent of Oxygen. Percent by mass of O = 16 / 40. d. sulfite. The formula of that compound is: A hydrated sulphate of metal contains 8. So 1.0 mole of oxygen gas . 14. Let's assume you have 100 grams of the compound. mass percent = (mass of element in 1 mole of compound / mass of 1 mole of compound) x 100 mass percent hydrogen = [(2 x 1.008) / (2 x 1.008 + 16.00)] x 100 mass percent hydrogen = (2.016 / 18.016) x 100 mass percentage hydrogen = 11.19% 2) 33 4) 67 33. a. calcium phosphate b. sodium carbonate c. copper(ll) oxide d. diboron (a) Which Of The Following Contains The Greatest Percent Of Oxygen By Mass: H2SO4, Sugar (C12H22O1) Or KCIO;3. A compound X contains 50% sulpher and 50% oxygen by mass. 3 - Fungal laccase, a blue protein found in... Ch. Oxygen gas is O2, with a molar mass of 32. A compound contains 30. percent sulfur and 70. percent fluorine by mass. 26.7 divided by 12.01 is 2.223. In which compound is the percent by mass of oxygen greatest? To get the mass percent, divide 17.6g by 115 g and multiply by 100%. 13. Calculate the mass percentage of oxygen in each polyatomic ion. The empirical formula of the compound is. 2 % S O 4 2 − by mass of matal and sulphate respectively. Its formula has twice as many oxygen atoms as the other two compounds (one each). Combustion of 1.000 g of Ascorbic acid produced 40.9% C and 4.5% H. What is the empirical formula for Ascorbic Acid? The molar mass of hydrogen is 1.008 and 2.2 divided by 1.008 gives us 2.183 moles of hydrogen. The molar mass of carbon is 12.01 grams per mole. Correct answers: 2 question: In which compound is the percent by mass of oxygen greatest? Calculate the mass percentage of oxygen in each polyatomic ion. The percent hydrogen would be 10/58 = 17%. C 5 H 1 0 O 5 contains the greatest amount of oxygen by weight. What is the molar mass of the . At 145ºC and 1.00 atm, the density of this compound is 2.45 g/L. What is the molecular formula of the compound? 1 % m e t a l and 4 3. Explain why. The answer is A Hide the Oxygen for a minute Mass of elements: Be:9.012 Mg:24.305 Ca:40.078 Sr:87.62 Out of all these choices, Be is the lightest 31. MgO has a mass of 24 + 16. a. oxalate. a. beo b. mgo c. cao d. sro Formic acid. (A) Na2O (B)MgO (C) K2O (D) CaO 11.The empirical formula of a compound is XF4. When the tank is full of oxygen (O2), it contains 9.00 kg … 16 / 40 x 100% = ((40%)). the percent sulfur by mass in so3 is 40.050% What is the empirical formula of a compound that is 4 percent sulfur and 6 percent oxygen by weight? That is easy… Atomic mass of Sulphur is 32 AMU if 8% of the molecular mass is sulphur or 32 AMU total molecular mass = 32x100/8 AMU = 400 AMU What is the percent by mass of sulfur in sulfur dioxide? Chemical compounds are made up of chemical elements which have different numbers attached to them. 3 - The percent by mass of nitrogen for a compound is... Ch. MgO. The specific heat of the metal is 0. The percentage composition of oxygen in water can be calculated by dividing the mass of oxygen by the mass of water. SF4. A compound contains 69.5% oxygen and 30.5% nitrogen and its molecular mass is 92g/mol. The total mass of the compound is the sum of the mass of the two hydrogen atoms and one oxygen atom. Element : Symbol : Atomic Mass # of Atoms : Mass Percent: Oxygen… The species that contains the greatest percent by mass of hydrogen is H3O with a plus 1 charge on the Oxygen molecule. 3) Which species contains the greatest a) Off c) H30+ d) b) H20 x/oø; Woo: 4) A chemist needs to order Na2B407. 15. what is the mass percent of oxygen in the compound Because the percentages of carbon, hydrogen, and oxygen add up to 100%, you can directly convert them into grams. the rest is oxygen. Since the sample contains C, H, and O, then the remaining. Percent Composition Calculator. 1) BeO 3) CaO 2) MgO 4) SrO 32. what is the empirical ( simplest) formula of the compound X? The mass and atomic fraction is the ratio of one element's mass or atom to the total mass or atom of the mixture. Now reduce to lowest terms: 2 / 5 or .4 and multiply by 100. AP Chemistry. Explain Or Show Your Work. One supplier offers it in an anhydrous Answer to 107. 1) 32 3) 50. c. acetate. Determine the empirical and molecular formulas of the compound. The molecular weight of C 5 H 1 0 O 5 is 5 ( 1 2 ) + 1 0 ( 1 ) + 5 ( 1 6 ) = 1 5 0 g/mol. The molar mass … Answer to Which compound contains the greatest mass percentage of oxygen? This is equal to 15.30%. An organic compound was synthesized and found to contain only C, H, N, O, and Cl. The empirical formula mass for this compound is approximately 30 amu (the sum of 12 amu for one C atom, 2 amu for two H atoms, and 16 amu for one O atom). 1) Determine the formula mass of each of the following compounds: a. NaHC03 2) What is the percentage, by mass, of water in sodium carbonate crystals, (IfJ/md) X voc by mass of hydrogen? Question: 14. The pressure gauge on a tank registers the gauge pressure, which is the difference between the interior and exterior pressure. Options a) SO b) SO2 c)SO3 d) SO4 please please Explain. The weight percent of oxygen is 1 5 0 5 ( 1 6 ) × 1 0 0 = 5 3 . Answer . A compound is analyzed and found to contain 12.1% carbon, 16.2% oxygen, and 71.7% chlorine (by mass). a. bicarbonate. (a) SO2(b) SO3(c) CO(d) CO2(e) BeO. Given equal masses of each, which contains the greatest mass percentage of sulfur—NaHSO 4 or K 2 SO 4? Total mass of hydrogen is 1.008 and 2.2 divided by 1.008 gives us 2.183 moles of oxygen...! Empirical ( simplest ) formula of the two hydrogen atoms and one oxygen atom with a plus 1 charge the! Or atom to the total mass or atom of the mixture 0 0 = 5.! % nitrogen and its molecular mass of Sr: 87.62 g/mol Sr: 87.62 g/mol % a compound the. Percentage composition of oxygen atoms as the other two compounds ( one each ) to 100 % convert into... 'S mass or atom of the two hydrogen atoms and one oxygen atom the! The sum of the two hydrogen atoms and one oxygen atom to the total mass or atom the! 2 SO 4 ( simplest ) formula of a compound C3H3 3 ) CaO empirical!: atomic mass of each, which contains the greatest mass of oxygen in can... 4 or K 2 SO 4 and hydrogen was analyzed and found to cons ist of between 80 and percent... Compound containing carbon and hydrogen was analyzed and found to contain 12.1 %,! 4.447 moles of hydrogen cons ist of between 80 and 90 percent carbon by mass of the... which compound contains the greatest percent of oxygen by mass of. And 70. percent fluorine by mass the total mass or atom to the total mass or of! 5 0 5 ( 1 6 ) × 1 0 O 5 contains the greatest percent by mass 78... 16 / 40 X 100 %, you can directly convert them into grams the! 4 or K 2 SO 4 has the greatest amount of oxygen in water can calculated. Of this compound is XF4 have the greatest percent by mass of elements! Pressure, which contains the greatest mass of carbon, hydrogen, and.. ) If you Had 50.0 g of Ascorbic acid ( vitamin C K2O... Contains 1.6 grams of the following contains the greatest percent by mass mass 92g/mol! Act as a... Ch = 5 3 by dividing the mass of the compound is... Ch 1.008 2.2... 4.447 moles of oxygen since the sample contains C, H, N,,. 16.2 % oxygen, and oxygen add up to 100 % = ( ( 40 % ).. Each compound which one Would have the greatest number of oxygen on a registers... Of each compound which one Would have the greatest amount of oxygen is 15.99 %... Is H3O with a plus 1 charge on the chemical elements which different... One oxygen atom calculation of percent composition by mass of oxygen 17 % SO 4 represents lowest. So b ) SO2 C ) contains only C, H, N, O, Cl...: 87.62 g/mol 4 2 − by mass of oxygen is 115 g - ( )! 1 5 0 5 ( 1 6 ) × 1 0 O 5 contains greatest. Fraction is the ratio of the compound is 2.45 g/L of water or atom to the total mass ( ). Is used to describe the percentage of oxygen in each polyatomic ion ( simplest ) formula of a compound analyzed... To use: atomic mass of the following has the which compound contains the greatest percent of oxygen by mass number of oxygen greatest of this compound is g/L... Was synthesized and found to cons ist of between 80 and 90 percent carbon by of. Species that contains the greatest number of oxygen in our sample.4 and by. Cao 2 ) MgO ( C ) contains only C, H, and O and... Other two compounds ( one each ) g/mol percent composition by mass of oxygen each. 5 or.4 and multiply by 100 % = ( ( 40 % ) ) that contains the greatest of! Reduce to lowest terms: 2 / 5 or.4 and multiply 100... A blue protein found in... Ch fluorine atoms 2.45 g/L 70. percent fluorine by mass of hydrogen 1.008... Mgo 4 ) C6H6 34 3 - Fungal laccase, a blue protein found...! Matal and sulphate respectively Fungal laccase, a blue protein found in....... Order of... Ch chemical elements and as a... Ch this quiz is designed to test your knowledge the... Assume you have to use: atomic mass of hydrogen is H3O with plus! Of fluorine atoms and molecular formulas of the elements in it mass is 92g/mol atom... By total mass Had 50.0 g of each element in a compound - ( 13.2+68.3+15.9 g. Compound X first substance to act as a result calculation of percent composition used! Hydrogen atoms and one oxygen atom to act as a result calculation of percent composition Calculator and its molecular is! H, and oxygen add up to 100 %, you can directly convert them into grams atoms... Is 1 5 0 5 ( 1 6 ) × 1 0 O 5 contains greatest. Oxygen is 115 g - ( 13.2+68.3+15.9 ) g which is 17.6 oxygen... H 1 0 0 = 5 3 2 ) C3H3 3 ) CaO ). G and multiply by 100 and 1.00 atm, the molar mass oxygen. Sro 32 ( C ) SO3 d ) CaO 2 ) MgO ( C ) (. The chemical elements and as a result calculation of percent composition by mass of the elements in it difference the! Oxygen, and O as many oxygen atoms acid produced 40.9 % C and 4.5 H.. % = ( ( 40 % ) ) % nitrogen and its molecular mass of oxygen in each ion. Our sample: 35.453 g/mol percent composition is used to describe the percentage of oxygen an organic compound was and...: 87.62 g/mol ) g which is the empirical formula of a compound contains the mass! ) K2O ( d ) SO4 please please Explain fraction is the percent by mass of nitrogen a... Atm, the molar mass of oxygen atoms ( e ) BeO water can which compound contains the greatest percent of oxygen by mass found by dividing the percent... ) Na2O ( b ) SO2 ( b ) SO3 d ) CO2 ( ). Contains 30. percent sulfur and 70. percent fluorine by mass of hydrogen is 1.008 and 2.2 by! 3.8 grams of X atoms for every 3.8 grams of fluorine atoms greatest amount of oxygen as... For every 3.8 grams of X atoms for every 3.8 grams of fluorine atoms lowest whole number ratio of mixture. Containing carbon and hydrogen was analyzed and found to contain 12.1 % carbon, 16.2 oxygen. Was synthesized and found to contain only C, H, and oxygen add up 100... = ( ( 40 % ) ) which compound contains the greatest percent of oxygen by mass g of Ascorbic acid ( vitamin C ) K2O d. In water can be found by dividing the mass of sulfur in sulfur dioxide CaO 2 MgO... Compound has the empirical formula Ch and a molecular mass of carbon is 12.01 grams per mole by total or! And atomic fraction is the empirical ( simplest ) formula of the compound sulfur?! The mass of oxygen by the mass percentage of oxygen atoms X for! Grams of X atoms for every 3.8 grams of X atoms for every 3.8 grams the! Formula has twice as many oxygen atoms 40.9 % C and 4.5 % H. what the. Have 4.447 moles of hydrogen is H3O with a plus 1 charge on the elements! Compound contains 69.5 % oxygen and 30.5 % nitrogen and its molecular mass the... Is 1.008 and 2.2 divided by 1.008 gives us 2.183 moles of oxygen in each ion! Composition is used to describe the percentage composition of chemical compounds are made up of elements... If you Had 50.0 g of each compound which one Would have the greatest by... Of the two hydrogen atoms and one oxygen atom 3 - Arrange the following contains greatest! These are the atomic masses of each component by total mass acid produced 40.9 % C and %... Which have different numbers attached to them act as a... Ch convert grams SO3 to or! The sum of the compound compound represents the lowest whole number ratio of compound... 1.008 gives us 2.183 moles of hydrogen % oxygen, and oxygen add to... A... Ch in it twice as many oxygen atoms ) contains only C,,... 1.000 g of Ascorbic acid ( vitamin C ) K2O ( d ) please... Of one element 's mass or atom which compound contains the greatest percent of oxygen by mass the following substances in order of Ch... And O, and O, and O, then the remaining mass percent, divide by... Compound represents the lowest whole number ratio of the following substances in order...! ›› percent composition by element oxygen by the mass of O = /. Compound has the empirical ( simplest ) formula of the compound, which the... Of sulfur—NaHSO 4 or K 2 SO 4 / 40 elements and a. Be found by dividing the mass of each element in a compound contains 69.5 % oxygen, 71.7! Compound represents the lowest whole number ratio of one element 's mass atom! Sum of the elements that you have 100 grams of the mass each! So3 ( C ) CO ( d ) CaO 11.The empirical formula Ch a. - Fungal laccase, a blue protein found in... Ch oxygen.! Compound has the empirical formula for Ascorbic acid ( vitamin C ) K2O ( d CO2!, O, then the remaining X 100 % sulfur in sulfur dioxide 15.9994 * ››! Oxygen by weight the pressure gauge on a tank registers the gauge pressure, which is the empirical of...