(The formula in this problem may not be a real molecule.) How many grams of hydrogen atoms are present in a sample of C3H7 if there are 27.0 moles of carbon atoms in the sample? C = 12.01 g/mol H = 1.01 g/mol Round your answer with the correct number of significant figures. Your Answer: units Answer

(The formula in this problem may not be a real molecule.) How many grams of hydrogen atoms are present in a sample of C3H7 if there are 27.0 moles of carbon atoms in the sample? C = 12.01 g/mol H = 1.01 g/mol Round your answer with the correct number of significant figures. Your Answer: units Answer

Chemistry & Chemical Reactivity

9th Edition

ISBN:9781133949640

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter2: Atoms Molecules And Ions

Section: Chapter Questions

Problem 125GQ: Saccharin, a molecular model of which is shown below, is more than 300 times sweeter than sugar. It...

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Ifan average fluorine atom has a mass of 3.161023 g, what is the average mass of a chlorine atom in grams?
Saccharin, a molecular model of which is shown below, is more than 300 times sweeter than sugar. It was first made in 1807, when it was common practice for chemists to record the taste of any new substances they synthesized. (a) Write the molecular formula for the compound, and draw its structural formula. (S atoms are yellow.) (b) If you ingest 125 mg of saccharin, what amount (moles) of saccharin have you ingested? (c) What mass of sulfur is contained in 125 mg of saccharin?
This is the chemical formula for carvone (the chemical that gives spearmint its flavor): C10H14O An organic chemist has determined by measurements that there are 0.042 moles of carbon in a sample of carvone. How many moles of oxygen are in the sample? Round your answer to 2 significant digits.
Aspartame is an artificial sweetener that is 160 times sweeter than sucrose(table sugar) when dissolved in water. It is marketed as NutraSweet. The molecular formula of aspartame is C14H18N2O5. A. What is the mass in grams of 1.0exp9 molecule of aspartame? B. What is the mass of grams of one molecule of aspartame?
a) What is the mass, in grams, of 5.000 moles of carbon atoms? b)What is the average mass, in grams, of a)one helium atom? b)one potassium atom? c. How many sodium atoms are there in 6.00 moles of sodium? d. a)How many moles of sodium atoms are there in100.0g of sodium?b)How many sodium atoms are there in100.0g of sodium? e. Calculate the number of moles in 50.7grams of hydrogen.
A 1-carat diamond is pure crystaline carbon and has a mass of 0.200 g.Which contains more carbon atoms, a 1-carat diamond, or a googol (10 x 10^100) of atoms?
How many hydrogen atoms are in each of the following: Part A: C2H5OH Express your answer as an integer. Part B: Ca(C2H5COO)2 Express your answer as an integer Part C: (NH4)2HPO4 Express your answer as an integer.
Polyethylene is a hydrocarbon polymer used to produce food -storage bags and many other flexible plastic items. A combustion analysis of a 1.26-g sample of polyethylene yields 3.94 g of C*O_{2} and 1.61 g of H_{2} * O What is the empirical formula of polyethylene ? Write numbers only to 3 significant figures (no units) and for numbers < 1 include a "" before the decimal point .
A compound is 40.0% C, 6.70% H, and 53.3% O by mass. Assume that we have a 100.-g sample of this compound. The molecular formula mass of this compound is 240 amu . What are the subscripts in the actual molecular formula? Enter the subscripts for C, H, and O, respectively, separated by commas (e.g., 5,6,7).
How many grams of ClCl are in a 38.0-g sample of the chlorofluorocarbon C2F3Cl3? Express your answer in grams of chlorine to three significant figures.
Dinitrogen oxide (or nitrous oxide), N2O, also known as laughing gas, is widely used as an anesthetic in dentistry. How many grams are in 1.50 moles of dinitrogen oxide? Express your answer with the appropriate units. How many moles are in 29.0 g of dinitrogen oxide? Express your answer with the appropriate units.
Significant figures are important! Remember that zeros are often significant and must be counted! A fictional compound contains potassium, a fictional metal, Z , oxalate and water. It is a hydrate. Its general formula is K2Zy(C2O4)z . nH2O. As you can see, the subscript for the potassium is given, but the other subscripts are unknown, as well as the number of water molecules per formula unit (n). A sample of the unknown compound was placed in a weighed drying pan and heated to give the data below. Use this data to find out the % water in this compound. The experimental data: Mass of the drying pan = 1.445 g Mass of drying pan and compound (Before Heating) = 7.175 g Mass of drying pan and compound (After Heating) = 6.865 g Calculate the % Water (by mass) in this compound. 1.b)The literature (actual) value of % water = 5.399 %. Comment on errors in this experiment.