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empirical formula

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Chemistry
a compound has an empirical formula of C3H5O2 and a molar mass of 145,14g. what is the molecular formula of this compound?

Chemistry
A compound of molecular weight 70.1 has the following composition: Carbon 85.63% and hydrogen 14.37%. What is the empirical formula? What is the molecular formula?

Chemistry
An organic compound that has the empirical formula CHO has a molecular mass of 145 amu. Its molecular formula is?

chemistry
Which is the molecular formula of a compound with the empirical formula BCH3 and a molecular mass of 103.38g/mole?

chemistry
lactic acid is the avid responsible for the sour test in spit milk. on the basis of combustion analysis, it's percentage composition by mass is 40.00% carbon, 6.71%hydrogen and x% oxygen. a. Calculate the empirical formula of lactic acid b. The molar mass of lactic acid is 90g...

IGCSE Chemistry
Hydrocarbons A and B both contain 85.7 % carbon. Their molar masses are 42 and 84 respectively. a) Which elements does a hydrocarbon contain? b) Calculate the empirical formula of A and of B. c) Calculate the molecular formula of A and B. I solved a) and b) the solutions are a...

Chemistry
Is this correct? What is the experimental empirical formula of zinc chloride? Determine the simplest whole number ratio of moles of zinc used, to moles of chlorine reacted in the zinc chloride that was produced..028 moles of Zinc .025 moles of Cl .025 moles of Cl is smaller ....

Chemistry
A compound has the empirical formula CHCl. A 256 mL flask, at 373 K and 750. torr, contains 0.800 g of the gaseous compound. Give the molecular formula.

science
The mass of the empirical formula is 100g; the mass of the molecular formula is 200g. What is the value of n?

science
The mass of the empirical formula is 100g; the mass of the molecular formula is 200g. What is the value of n?

Chemistry
A compound has an empirical formula of CH2 and molecular mass of 84g. What is it's molecular formula?

Chemistry
I am completing my lab and cannot figure this out. I need someone to go over it and make sure I am right because I can't figure out why my empirical formula does not match the molecular formula. #7 is the one I am really having a problem with, but here is all the info so you ...

Chemistry
For Peroxyacyl nitrate (PAN) A compound of C,H,N,O Determine the empirical formula from the percent composition by mass: 19.8% C, 2.50% H, 11.6% N What is its molecular formula given that its molar mass is about 120g?

CHEM QUESTION
In writing and balancing equations using sulfur chemists usually use the empirical formula, S, rather than the molecular formula. Why? I'm not sure how to answer this question.

chemistry
Calculate the empirical formula for each of the following natural flavors based on their elemental mass percent composition. nitroglycerin (used medically as a vasodilator to treat heart conditions): C 15.87% H 2.22% N 18.50% O 63.41%. Express your answer as a chemical formula.

chemistry
Calculate the empirical formula for each of the following natural flavors based on their elemental mass percent composition. nitroglycerin (used medically as a vasodilator to treat heart conditions): C 15.87% H 2.22% N 18.50% O 63.41%. Express your answer as a chemical formula.

General Chemistry
Answer Check Please... A compund contains only hydrogen and nitrogen and is 12.6% hydrogen by mass. A gaseous sample of the compound has desity of 0.925g/L at 690 torr and 110 degrees Celsius. What is the molecular formula of the compound? My Empirical Formula = H2N Molecular ...

Chemistry
What is the empirical formula of a molecule containing 65.5% carbon, 5.5% hydrogen, and 29.0% oxygen? -I found this to be C3H3O and WebAssign says it's right. I need help with part b. If the molar mass of the above compound is 110 grams/mole, what is the molecular formula?

chemistry
empirical formula for K 60.0% C 18.5% N 21.5% and P 7.5% I 92.5%

Chemistry
Xylose, a sugar isolated from wood, has the empirical formula CH2O. If a 6.25 mole sample of xylose has a mass of 938.3 g, what is xylose's molecular formula?

Pressure and Molecular Formula
2. How much potassium chlorate is needed to produce 20.0 mL of oxygen at 670 mm Hg and 20 degrees C. 3. A certain compound containing only carbon and hydrogen was found to have a vapor density of 2.550 g/L at 100 degrees C and 760 mm Hg. If the empirical formula of this ...

Chemistry (30s)
I need help on this question. I can't seem to understand it. Find the molecular formula of a compound with a gram molecular mass of 30 g and an empirical formula of CH3. Please show your work! and briefly explain how you got it!

chemistry
complete combustion of a 0.0100mol sample of hydrocarbon, CxHy, gives 1.344 L of CO2 at STP and 0.720 g of H2O. a. what is the molecular formula of hydrocarbon? b. what is the empirical formula of hydrocarbon?..

chemistry
Boron forms a gaseous compound with hydrogen with empirical formula BH3. a 1.05L sample of this compound at a pressure of 88 mm Hg at 295K has a mass of .138g. what is the molecular formula of the compound?

Chemistry
A compound has the empirical formula CHCL .A flask with volume 253 cm3 at temperature of 373K and pressure of 1.0 atm contains 0.8 g of the gaseous compound. Find the molecular formula of the compound.

Chemistry
What is the empirical formula for Dichloroethane?

chem
What is the empirical formula for Ba(NO3)2

Chemistry
what is the empirical formula for a compund with 26.2 g N, 7.5 g H, and 66.3 g Cl?

chemistry
A compound is 52.17 % C, 13.04 % H and 34.78 % O. What is its empirical formula?

chemistry
A 12.0g sample of carbohydrate contain 4.50g of carbon, 3.25g of oxygen, and some hydrogen. Determine the percent by mass of hydrogen in your product. Find the empirical formula for a compound that consists of aluminum and chlorine in which the aluminum is 20.2 % by mass. . A ...

Chemistry
In the experiment 0.500 g of copper reacted with oxygen to give 0.563 g of copper oxide. What is the empirical formula of the oxide expressed as a chemical formula?

Physical science
1. Nicotine,a poisonous compound found in tobacco leaves,is 74% carbon,8,65% hydrogen and 17,35% nitrogen (a)calculate the empirical formula of nicotine (b)what is the molecular formula of nicotine if it has a molar mass of 165 g.mol^-1

Chemistry grade 11
An organic compound is composed of C, H and O. A 0.1005 g sample of this is combusted, producing 0.2829 g CO2 and 0.1159 g of H2O. What is the empirical formula of this compound? If the compound has a molar mass of 14 g/mol. What is the molecular formula?

College Chemistry 3
Find the empirical Formula of a compound that is 30.4% nitrogen by mass, and consists of only nitrogen and oxygen. What is its molecular formula if its molar mass is 92g/mol?

Chemistry
How do I find the empirical formula of FeSO4? Thanks!

maths
what is the empirical formula of a compound containing C(60%), H( 4.44)

Chemistry
What is the empirical formula of caffeine (C8 H10 N4 O2)? How do I get it? Thanks

Chemistry
What's the correct empirical formula for CO2?

Chemistry
Calculate the empirical formula of Tylenol: C, 63.56%; H, 6.00%; N, 9.27%; O, 21.17%

Chemistry
Analysis of a sample of an organic compound showed it contains 39.9%carbon,6.9%hydrogen and 53.2%oxygen. a)calculate the empirical formula b)if the relative molecular mass is 60,what is the molecular formula of the compound.(C=12,H=1,O=16)

Chemistry
A 7.85 g sample of a compound with the empirical formula C5H4 is dissolved in 301 g of benzene. The freezing point of the solution is 1.05C below that of pure benzene. what are the molar mass and molecular formula of this compound?

chemistry
An analysis of an unknown compound found it contained 40 g potassium, 52 g chromium and 56 g of oxygen. a) What is the empirical formula for this compound? Show the work you did to determine the formula. b) What type of compound is it, ionic, covalent or a combination of both...

CHEMISTRY
A compound which contains hydrogen, oxygen, carbon only has molar mass of about 85 g/mol. When 0.43 g of the compound is burned in excess of oxyfen, 1.10 g of CO2 and 0.45 g of H2O are formed. Find the molecular formula and the empirical formula of the compound

chemistry.
What is the empirical formula of a hydrocarbon that contains 89,94 by mass?

chemistry.
What is the empirical formula of a compound that contains 29% Na, 41% S, and 30% O by mass?

science
A compound contains 3.99% P, 82.3% Br, and 13.7% Cl. Find the empirical formula

Chem
What is the empirical formula of a compound that contains 27.0%S, 13.4%O,and 59.6%Cl by mass?

Chemistry
What is the empirical formula of a hydrocarbon that contains 89.94% C by mass?

Chemistry
What is the empirical formula of a hydrocarbon that contains 89.94% C by mass?

Chemistry
Empirical formula 12.67 aluminum, 19.73 nitrogen, 67.60 oxygen

Chemistry
Calculate empirical formula C=41.7%,H=6.2%,N=19.3%, and O=33.1% Thanks. any help at all will be awesome!

Chemistry
What is the empirical formula for a compound that is 1.67g Ce and 4.54g I?

chemistry
A compound contains 74,27%C;7,79%H;12,99%N. Determine the empirical formula. C=12;H=1;N=14;0=16.

science
How do work out what the empirical formula for aluminium selenide is? You need to provide the data. It's easier to explain with numbers than try to go through it with words. You do you not have numbers? Perhaps the question is, "How do we know what the formula of aluminum ...

chemistry
3. Another volatile liquid was used in a similar experiment. A student found that 0.32 g of vapor had a volume of 152ml at 100 celsius and 1 atm. What was the molar mass of this gas? 4. The empirical formula of the unknown gas in question 3 is CH4O. What is the molecular ...

empirical formula of a compound
how many grams of Mg combine with 1.50 g of Cl ions in MgCl2 ?

Chem
what is the empirical formula of aspirin, C9H8O4? is it the same again ?

Chemistry
Please help me solve this empirical formula.Im so confused C=58.5% H=4.1% N=11.4% and O=26.0% Thank you so much

Chemistry
A compound contains 69.9% iron and 30.1% oxygen. What is its empirical formula?

Chemistry
A compound of B and H is found to have a mass percent composition of 81.1% Boron. Its empirical formula is B2H5. A mass spectrometry experiment tells us that the molecular mass is 53.3 g/mol. What is its molecular formula? So I feel like this is a trick question, because I ...

AP Chemistry
Anthraquinone contains only carbon, hydrogen, and oxygen and has an empirical formula os C7H2O. The freezing point of camphor is lowered by 22.3 C when 1.32 g anthraquinone is dissolved in 11.4 g camphor. Determine the molecular formula of anthraquinone

Chemistry
The empirical formula of a compound is CH2O and the molecular mass is 180. What is the molecular formula of the compound?

Chemistry
An organic acid has a percentage composition by mass of C 41.4%, H 3.4%, and O 55.2%. A solution containing 0.250g of the acid, which is dibasic required 26.60 cm cubed of NaOH solution (0.20 mol.dm -3) for neutralisation. Calculate the empirical formula, molecular formular, ...

Chemistry
Predict the empirical formula of the ionic compound, Cs and C. How would I do this? Is it Cs_2C?

Chemistry
What is the empirical formula of a compound that has a carbon-to-hydrogen ratio of 2 to 6? Is it CH3?

Chemistry
What is the empirical formula if given c-.1929 h-.01079 o-.08566 cl-.1898

Chemistry 3A
calculate the empirical formula for an unknown compound from the following information: C= 39.2%, H= 8.73% and O= 52.1%

chemistry
A 25g sample of a compound composed of Carbon, Hydrogen, and Oxygen was combusted. 55grams of Carbon Dioxide and 30 grams of water were collected. A) What is the empirical formula of the compound? B) If the compound has a molar mass of 120g what is the molecular formula?

Chemistry
2) What is the empirical formula of a compound containing C, H, O if combustion of 1.23g of the compound yields 1.8g CO2 and .74g of H2O 3) What are the empirical and molecular formulas of a hydrocarbon if combustion of 2.10g of the compound yields 6.59g CO2 and 2.7g H20 and ...

Chemistry
An unknown gaseous hydrocarbon contains 85.63 % carbon. If its density is 0.488 g/L at 0.355 atm and 100°C, what is the molecular formula of the gas? I can't figure this out. By assuming the total mass to be 100g, I get 85.63g C and 14.37g H which I then used to get the ...

chemistry
A solution is prepared with an unknown compound with an empirical formula of C3H7NO. The solution is made by dissolving 30.0 mg of compound in 1.200 g of the organic solvent biphenyl. The freezing point was depressed by 1.37C. What are the molar mass and molecular formula of ...

Chemistry
Hi Im reposting incase my original post doesn't get read. Please see bottom for additional info that I need help getting verified. Many thanks Hi Please help verify my answer to the following question: 0.500g of pure phosphorous was burned in excess pure oxygen to give a ...

chem
combustion analysis of a 285.7 mg sample of a hydrocarbon produces 880.8 mg of CO2 ans 405.7 mg of H2O. What is the empirical formula of the compound? a rough measurement of the molecular weight indicates it is a little over 100mg/mol. what is the molecular formula of the ...

chem
methyl salicylate has a mass percent composition of 63.2% C, 31.6% O, and 5.26% H.The mass of one molecule of the compound is 2.53 x 10^-22.Determine the empirical formula and the molecular formula for methyl salicylate.

chemistry
Derive the empirical formula of a hydrocarbon that on analysis gave the following percentage by mass composition: C = 85.63 % and H = 14.37 %. If the molecular mass of this compound is 56 g, derive the molecular formula.

chemistry.
What is the empirical formula of a compound that contains 29% Na, 41% S, and 30% O by mass? ..My answer is NaSO and I am not sure... can anyone help me for it?????????

Chemistry
Determine the empirical formula for the compound that contains 55.0 g carbon and 294 g sulfur

chemistry
Predict the empirical formula of the compound formed by each of the following pairs of elements.a) Li,S b) Na,H c) Al,l d) Ca,O

Chemistry
What is the empirical formula of a compund composed of 3.25% hydrogen(H), 19.36% carbon(C) and 77.39% oxygen(O) by mass?

Chemistry
Calculate the empirical formula for the compound 1.245g Ni, 5.381g I Can you help with the steps please

Chemistry
What is the empirical formula for a compound which contains 67.1 percent zinc and the rest is oxygen

matla
  4.6 g of an oxide of nitrogen contains 3.2 g of oxygen. Calculate the empirical formula of the compound.

chemistry
A liquid was analyzed to be 54.5% C, 9.10% H, and 36.4% O. An empty flask, whose mass was 45.32 g, when filled with the vapor of the liquid at 735mm Hg and 99.2°C had a mass of 46.05 g. The volume of the flask was found to be 263.2 mL. empirical formula -> C2H4O What is ...

Chemistry 11
a gas has an empirical formula C6H7O5. When put in a 50mL bulb at 120 degrees celcius and 120kPa (pressure) it's mass is determined: the mass is 10.37 times as much as C6H6O. What is the molecular formula of the gas (C6H7O5)?

chem 11
a gas has an empirical formula C6H7O5. When put in a 50mL bulb at 120 degrees celcius and 120kPa (pressure) it's mass is determined: the mass is 10.37 times as much as C6H6O. What is the molecular formula of the gas (C6H7O5)?

chemistry
a compound with the molecular weight of 276 grams was determined to be 39.10% carbon, 8.77% hydrogen, and 52.13% oxygen. what is the empiricial formula and the molecular formula for the compound? i do not know where to start! i worked it out and i got 276/100=2.76 do i round ...

Chemistry
A 185.325 g sample of a compound of carbon, nitrgoen and hydrogen is burned completely. Calculate the empirical formula if 225.0 g of water and 230.0 g of NO2 is formed. In another experiment the sample was found to have a density of 10.9 g/L at 1.20 atm and 25.0 degrees ...

Chemistry
Tooth enamel is made up of hydroxyapatite, Ca_10(PO_4)_6(OH)_2 or the empirical formula, Ca_5(PO_4)_3(OH). Use the empirical formula for all calculations because stoichiometry plays two significant roles. A. Print the balanced chemical equation for the molar solubility of ...

Chemistry
Combustion analysis of a 1.00g sample of ascorbic acid yields 1.500g of CO2 and 0.409g of H2O. What is the empirical formula of ascorbic acid? (a. CHO B.CH2O C. C2H4O2 D. C3H4O3 E.Cannot be determined with the information given. ) Convert the 1.5 g of CO2 and 0.409 g of H20 by...

Chemistry
i asked this question earlier and thanks to dr bob i got the empirical formula. which is C6H3O2. I need help finding the molar mass to get the molecular formula. Terephthalic acid is an important chemical used in the manufacture of polyesters and plasticizers. It contains only...

AP Chemistry
An organic compound was synthesized and found to contain only C, H, N, O, and Cl. It was observed that when .150g sample of the compound was burned, it produced .138g of CO2 and .0566g of H2O. All the Nitrogen in a different .200g sample of the compound was converted to NH3, ...

chemistry
Calculate the empirical formula of each compound from the mass-composition data given below. A)41%N and 59%O B)45%Na,23%P and 32%O

Science-chemistry
A compound is found to have 56.4% potassium, 8.7% carbon, and 34.9% oxygen. What is the empirical formula?

chemistry
2.8% hydrogen, 9.8% nitrogen,20.5% nickel, 44.5% oxygen, and 22.4% sulfur determine empirical formula for compounds

chemistry
What is the empirical formula of a compound that is 14 g calcium, 11 g oxygen, and 0.7 g hydrogen? A. CaO2H B. Ca2OH2 C. CaOH D. Ca(OH)2

Chem
A 18.46 g sample of a compound contains 5.89 g potassium (K), 5.34 g chlorine (Cl), and oxygen (O). Calculate the empirical formula.

chemistry
Determine the empirical formula of a compound found to contain the following 52.11% carbon, 13.14% hydrogen, and 34.75% oxygen

chemistry 110
Calculate the empirical formula of a compound containing 52.14% C, 13.12% H, and 34.73% O. I don't understand how they got the answer. please help

chemistry
Determine the empirical formula of a compound that contains 0.171 g of carbon combined with 0.471 g of oxygen.

chemistry
Determine the empirical formula of a compound that contains 0.171 g of carbon combined with 0.471 g of oxygen.

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