1) Glucose has the formula C6H12O6. What is the percent composition of oxygen in glucose to three significant digits?   2) A sample of a pure compound contains 68.4% chromium and 31.6% oxygen by mass. What is the empirical formula of this compound? (numbers entered will be considered subscripts)   3) What is the molecular formula of a compound with the empirical formula CH2 if the molecular mass of the compound is 56.10 g/mol?

Q: When I calculate 9.89g of caffeine (C8H10N4O2) into number of atoms I divide the mass by atomic mass…

A: Your calculations are on the right track, but it's important to understand the concept of the mole…

Q: 2. A sample of a substance containing only carbon, hydrogen, and oxygen has mass x in grams. It is…

A: The equation for the burning of carbohydrate is: x12a+b+16c CaHbOc  +  O2   →    y44CO2  +  Z18…

Q: Calculate the percent composition by mass of all the elements in urea, (NH2)2CO.

A: Since you have asked multiple question, as per our company guidelines we are supposed to answer…

Q: The “lead” in lead pencils is actually almost pure carbon and the mass of a period mark made by a…

A: Answer = 5.02 x 10 19

Q: , A mineral sample is obtained from a region of the country that has high arsenic contamination. An…

A: The empirical formula of a chemical compound is the simplest positive integer ratio of atoms present…

Q: Caffeine, a molecule found in coffee, tea, and certain soft drinks, contains C, H, O, and N.…

A: Given, Mass of caffeine = 10.0 g Mass of CO2 = 18.13 g Mass of H2O = 4.639 g Mass of N2 = 2.885 g…

Q: A 3.000 g sample of a gaseous compound was found to contain 2.560 g of carbon and  0.440 g of…

A: To answer this first of all we have to convert grams into moles and we have to determine the simple…

Q: please answer #11 on attachment document.  The empirical formula of ethylene glycol is:

A:

Q: You want to fill several balloons with hydrogen gas and light them on fire to produce a series of…

A: Aluminium metal reacts with sulfuric acid to form aluminium sulfate and hydrogen gas. The equation…

Q: 7. State the chemical composition (constituent elements and number of atoms of each element) for a…

A: Given  is a molecule of citric acid whose molecular formula is C3H4OH(COOH)3.  Chemical composition…

Q: Be sure to answer all parts. How many H atoms are in 58.5 g of isopropanol (rubbing alcohol), C3H₂O?…

A: Amount of isopropanol = 58.5 gm

Q: What is the mass (in grams) of 8.45 x 1023 molecules of dextrose: C6H₁2O6 (molar mass 180.16 g/mol)?

A: Molecular mass of dextrose is 180.16g/molWe have to find mass of 8.45 × 1023 molecules.

Q: Freon-12 (CCI2 F2) is used as a refrigerant in air conditioners and as a propellant in aerosol cans.…

A:

Q: The chemical formula for chlorophyll is C 55 H 22 MgN 4 O 5 a) What is the molar mass of the…

A: Molar mass of a substance is the mass of one mole of that particular substance. The no of moles in a…

Q: Hydrogen is manufactured on an industrial scale by this sequence of reactions: CH₂(g) + H₂O(g) = CO…

A: The equilibrium constant of a chemical reaction gives a relationship between the reactants and the…

Q: ent in that c

A: Three conversion factors in order are: Convert grams of aspirin to moles of aspirin convert moles of…

Q: How many moles of Cu(NO3)2 are in 3.4 x 1022 molecules? Please have your answer in decimal format…

A:

Q: Hydrates take the form: compound·nH2O. An unknown hydrate has a molar mass of 446 g/mol.  If the…

A:

Q: How many molecules are in 4.83×1020 H2O2?   I don't quite understand how to do these calculations. I…

A: Note: Hey there! Thank you for posting the question. Since the unit is not given, we have taken…

Q: 8.50 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have…

A:

Q: This is the chemical formula for talc (the main ingredient in talcum powder): Mg3 (Si₂05), (OH)2 An…

A: 1 mole of A2B2 contains 2 mole A and 2 mole B

Q: mass

A:

Q: The bitter-tasting compound quinine is a component of tonic water and is used as a protection…

A: Data given: Mass of the sample = 0.487 g Mass of carbon dioxide produced = 1.321 g Mass of water…

Q: How many moles are there in 313.87 g of Hexane (CHiJ? O 6.28 O 0.16 O 3.65 O 0.27

A: Calculate moles of 313.87g of hexane ?

Q: Determine the mass in grams of 1.6 × 10⁻³ mol glucose (C₆H₁₂O₆)   How many moles of propylene (C₃H₆)…

A: The question is based on mole concept . We have to calculate moles,  mass and hydrogen atoms.

Q: Convert 1.59 x 1022 molecules/formula units of X5Z4 into grams of the same compound. (Assume that…

A: The given data contains, mass of X5Z4=1.59×1022molecules/formula molar mass =(5×54.94 g/mol)+(4×8.72…

Q: complete reaction

A:

Q: Convert 2,58 x 10 22 grams of X4Z2 into molecules/formula units of the same compound. (Assume that…

A: Answer :- Here I have explained the complete solution . Hope this will really help !!!!!!!!!!!!   So…

Q: 1. What is the empirical formula of naphthalene, C10H8? 2. The empirical formula of acetic is CH2O,…

A: Since you have asked multiple questions we will solve the 1st three for you. If you want an answer…

Q: A definiency in thhe vitamin nicotinamide results in the dietary deficiency disease pellagra,…

A: Given, the molecular formula for nicotinamide is C6N2H6O. We have to find the percent composition by…

Q: Ammonium phosphate ((NH,) PO,) is an important ingredient in many fertilizers. It can be made…

A:

Q: cond A B C D sketch of molecules in it H H C1O H-Ö C нӧ- H H :O: H H H-Ö H-Ö C H C || :0: C O: 010…

A: first, we have to find empirical formula of the given compounds

Q: What is the mass percent of silicon dioxide (SiO2) if you are able to separate 2.202g out of a…

A: The mass percentage of a compound in a mixture is equal to the ratio of the mass of that compound…

Q: How many C atoms are present in 8.94 · 1020 CH3C(O)H molecules? Express your answer in scientific…

A: Scientific notation is way to express the numbers that are too big or small to be written…

Q: If you place 6.46 X 1027 molecules of Ca(OH)2 into this equation, how many moles of Ca(NO3)2 will be…

A: Given: The reaction is as follows: 2HNO3+CaOH2→CaNO32+2H2O The number of molecules of…

Q: What is the mass percentage of carbon in C7H11O3? Express your answer as a percentage (i.e., out of…

A: Mass percentage of element in compound is defined as percent ratio of element mass to the whole…

Q: 2. Iron reacts with chlorine gas to form iron(II) chloride: 2 Fe(s) + 3 Cl₂(g) →→2 FeCl,(s) What…

A: Two mole of iron react with three mole of Cl2 and produced two mole of FeCl3

Q: The chemical formula for chlorophyll is C₅₅H₇₂MgN₄O₅. Given the molar mass of the compound is 893.49…

A: Given, mass of C₅₅H₇₂MgN₄O₅. = 1.501 g Molar mass of C₅₅H₇₂MgN₄O₅. = 893.49 g/mol  Number of moles =…

Q: Caffeine (MM = 194.2 g/mol) is a small molecule that many people ingest for its stimulant effects.…

A: Given molar mass of caffeine = 194.2 g/mol percentages C = 49.5℅ N = 28.9℅ H = 5.19℅ O = 16.5 ℅

Q: A mechanical engineer trainee is trying to study the combustion of natural gas, which is primarily…

A: Molar mass of a compound is equal to sum of atomic masses of all atoms present in that compound.…

Q: How many hydrogen atoms are in the compound (NH4)2CO3? Alex has a big black tattoo of a teddy bear…

A: #Q.1: The given chemical formula is (NH4)2CO3.

Q: Ammonium perchlorate (NH₂C1O₂) is the solid rocket fuel used by the U.S. Space Shuttle. It reacts…

A: 6.6 g of ammonium perchlorate NH4ClO4 undergoes decomposition reaction to produce nitrogen gas…

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.