A student calculated the number of moles of carbon dioxide present in a 100.0 g sample of a gaseous mixture. If the student determined that there is 0.30 mole of carbon dioxide present in the sample, what is the percent composition of carbon dioxide in the sample?

Q: A 58.5 g sample of an unknown compound that contains only carbon, hydrogen and oxygen was analyzed…

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Q: A compound containing only carbon, hydrogen, and oxygen is analyzed using combustion analysis. When…

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Q: A beaker contains 48.948.9 mL of carbon tetrachloride (CCl4CCl4, density is 1.591.59 g/mL).…

A: Volume of carbon tetrachloride = 48.9 mL  Density = 1.59 g/mL  Density = mass ÷ volume

Q: A student weighs out 94.53 grams of sodium permanganate, NaMnO4.  How many moles of NaMnO4 is this?…

A: Moles— It is the ratio of given mass of a compound to its molar mass  Mole = given mass / molar mass…

Q: An unknown compound has the following chemical formula: P2Ox where x stands for a whole number.…

A: Given :-  chemical formula ; P2Ox  no. of moles of O = 8.4 mol  no.of moles of P = 3.34 mol  To…

Q: Convert 1.23 x 104 atoms of carbon to moles of carbon. 1.23 x 104 atoms = mol C

A: Given,  No. Of atoms of carbon = 1.23 × 1024

Q: will

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Q: A) a 10.00g unknown sample with a formula of CxHY was analyzed by combustion analysis. The sample…

A: The values are given as follows:

Q: A chemist measures the amount of bromine liquid produced during an experiment. She finds that 658. g…

A: Given: Mass of bromine liquid produced - 658 g   To find: number of moles of bromine produced = ?…

Q: 5. A bottle of Ibuprofen (C,,H,,O,) contains 1.204 x 1024 molecules. How many grams of ibuprofen are…

A: The molecular weight is 206.29 g/mol means 1 mol of ibuprofen = 206.29 g of ibuprofen

Q: osmium by mass. a) If you assume 100.0 g of the compound, what is the mass in grams of osmium that…

A: Since you have posted a question with multiple sub- parts, we will solve first three sub- parts for…

Q: percent of carbon dioxide in the sample?

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Q: The chemical formula for lithium hydride is LiH. A chemist measured the amount of lithium hydride…

A: Moles = Mass / Molar mass  Moles of A = Mass of A / Molar mass of A

Q: present

A: Dear student I have given answer to your question in the image format.

Q: A student measured a 6.790 g sample of a hydrated salt. After heating, the mass of anhydrous salt…

A: a) Given that weight of hydrated salt is 6.790 g and mass of anhydrous salt is found to be 4.501 g.…

Q: In an experiment, a student took a 12.2 g sample of table sale and chemically separated the chlorine…

A: To find the percent composition of each element in table salt (NaCl), we need to determine the mass…

Q: 1.75 x 1023 atoms Pb converted to grams

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Q: An unknown compound has the following chemical formula: P,Cl, where x stands for a whole number.…

A: What is the value of x in PxCl3 =?

Q: Vitamin B12 , cyanocobalamin, is essential for human nutrition. It is concentrated in animal tissue…

A: The molar mass of cyanocobalamin is calculated using cobalt’s molar mass in step two.

Q: A 1.125-gram piece of magnesium was burned in the presence of oxygen, forming 1.866-grams of the…

A: Given : Mass of magnesium burned = 1.125 g And mass of magnesium oxide formed = 1.866 g

Q: The number of particles and amount, respectively, in 45.2 g of potassium nitrate is 2.69 x 10 22…

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Q: A sample of trifluoroacetic acid, C2HF3O2, contains 60.9 g of oxygen. Calculate the mass of the…

A: Sample of trifluoroacetic acid molecular weight                          = (12× 2+ 1+ 3×19+ 16×2) g…

Q: (Show all calculations where appropriate.) 1. A student measured a 6.790 g sample of a hydrated…

A: Some molecules have water of crystallization. The water of crystallizations is not bonded directly…

Q: In the gaseous state chlorine exists as a diatomic molecule Cl2 (molar mass=70.9g/mol). Calculate…

A: Given that in In the gaseous state chlorine exists as a diatomic molecule Cl2 (molar mass=70.9g/mol)…

Q: A molecular compound has the formula C12H12O2.  How many grams of this compound would you need to…

A: We have given, Mole of compound= 0.0800 mol Mass of compound=?

Q: 4.25 x 1024 atoms N converted to grams

A: We have given the atoms of nitrogen = 4.25 × 1024 atoms Avogadro's constant = 6.022 × 1023…

Q: 5 g of hydrated barium chloride is heated in a crucible until the mass of the sample no longer…

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Q: A sample of a compound has a mass of 41.13g. The sample is found to contain 37.28g of carbon and…

A: Percent composition of the compound is described as the percent of mass of each component of the…

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.