An unknown compound is 92.26% carbon and 7.74% hydrogen. The unknown compound has a Molar Mass of 78.113 g/mol. What is the molecular formula of the unknown?

Q: ow many fluorine atoms would it take to make up a mass of2.83×10—22 g?   25 atoms    None of the…

A: Given data, Mass of F = 2.83 x 10-22g Data taken from google; Molar mass of F = 18.998 g/mol

Q: Complete combustion of 2.30 g2.30 g of a hydrocarbon produced 7.49 g7.49 g of CO2CO2 and 2.30 g2.30…

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Q: Sodium bicarbonate (NaHCO3) is commercially known as baking soda. How many grams  and atoms of O are…

A: Sodium bicarbonate  (NaHCO3) is also known as baking soda. We are given with 15 g of sodium…

Q: How many grams of newmetal (Nm) are required to produce x.xx grams of newmetal oxide?  2 Nm (s) +…

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Q: What is the molar mass of ibuprofen, C13H18O2? A) 206.3 g/mol B) 289.4 g/mol C) 29.0 g/mol D)…

A: Molar mass of C = 12.01 g/mol  Molar mass of H = 1.008 g/mol  Molar mass of O = 16.00 g/mol

Q: How many grams of rhodium are in a 157.9-gram sample of RhCl 3? The molar mass of RhCl 3 is 209.26…

A: By the help of stoichiometric coefficient we can find the amount of unknown substance by the help of…

Q: grams of Na+ (23 g/mol) are contained in 25 g of Na2S04 (142 g/mo

A: The question deals with the mole concept. Number of moles of a substance depends upon the amount of…

Q: Ethanol, C2H5OH, has a density of 0.785 g/mL and a molar mass of 46.07 g/mol. How many moles of…

A: Solution : Given, Density of ethanol = 0.785g/mL means 0.785 g ethanol present  in 1mL of ethanol…

Q: and 36.32% O by mass. What is its empirical formula? Insert subscripts as needed.   empirical…

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Q: Dinitrogen monoxide (also known as nitrous oxide and used as an anesthetic) can be made by heating…

A: Theoretical yield It is the maximum amount of product that is formed which is determined by the…

Q: When 2.47 g of cobalt reacts with chlorine, the mass of the compound obtained is 6.04 g. What is the…

A: Mass of Cobalt = 2.47 g  Mass of compound formed = 6.04 g

Q: How many grams of NBr3 can be made from 525 g Br2  ?  N2   +   3 Br2   →   2 NBr3   +   44.0 kJ…

A: The reaction is as :-  N2 + 3Br2 ----> 2NBr3

Q: One mole of H2   A contains 6.0 x 1023 H atoms.   B contains 6.0 x 1023 H2 molecules.   C…

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Q: What mass (in kg) does 4.41 moles of copper have?     0.784 kg     0.444 kg     0.280 kg…

A: Given -  No of moles =4.41 moles  Molecular mass of  copper (M) = 63.546  g / mol No of moles = 4.41…

Q: How many molecules are in the sample? 87 g CCl4 Express your answer using two significant figures.

A: Number of moles can be calculated as follows: No. of moles = MassMolar massNo. of moles = 87g153.82…

Q: A student is running an experiment in which 70.8 grams of FeCO3 is needed, but the only jar of…

A: FeCO3.H2O MW = 133.845g / mol Given  Required FeCO3 = 70.8g

Q: Determine the number of C atoms in 0.01 g of Caffeine C8H10N4O2

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Q: How many moles of atoms are present in 154 g of HCl?   A) 4.22 mol B) 8.45 mol C) 0.0270 mol D) 2.00…

A: Given  Mass of HCl = 154 gram  Number of mole of atom = ?

Q: CH4 (g) + 202 (g) C02 (g) + 2H20(g) Suppose 8.00 g of CH4 is allowed to burn in the presence of…

A: Given information: 8.00 g of CH4  16.00 g of oxygen The reaction is given as follows: CH4 (g) +…

Q: An oxide of nitrogen contains 63.1% oxygen and has a molar mass of 76.0 g/mol. A. What is the…

A: The oxide contain % of O = 63.1 % % of N = 100-63.1 = 36.9 %

Q: symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic…

A: Atomic mass of He = 4 g/mol Number of moles of He = 2.5 moles

Q: If an air conditioning unit is charged with 7.0x10^22 molecules of R-113 (C2Cl3F3), what mass of…

A: Given : Number of molecules of C2Cl3F3 = 7.0 X 1022

Q: How many molecules are in the sample? 17 g C6 H12O6

A: No. Of molecules= (given mass/molecular mass) * Avogadro's no. Avogadro's no. is 6.023*1023

Q: 11.An unknown compound is comprised of 25.9% N and 74.1% O. The molecular mass of the compound is…

A: Answer

Q: A chemical compound has a molar mass of 136.63 g/mol. How much would 2.46x10^22 molecules of this…

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Q: How many water molecules does 9 grams of water ( H2O ) contain? a) 6.02X1023 b) 6.02X10-23 c) 3.01…

A: We have to calculate the number of molecules.

Q: Which contains the greatest mass of oxygen?   0.75 mol of ethanol (2C H5 OH)   1.0 mol of water…

A: Which contains the greatest mass of oxygen?

Q: When 145 g of MnCl₂ × nH₂O is heated, 92 g of the anhydrous compound is obtained. Find the number n…

A: Here n is number of moles of H2O, given that the mass of water = 92g

Q: The empirical formula of a compound is C8H5N3O5. The compound has a molar mass of 892.6 g/mol;…

A: Molecular formula: In a molecular formula we describe the number of atoms of all the elements…

Q: Safrole, one of the flavor molecules in sassafras, contains only C, H, and O. Combustion of 10.0 g…

A: Given that - Safrole contains only Carbon, Hydrogen and oxygen as constituent elements. On heating…

Q: An unknown organic compound contains 41.4 % carbon, 3.47 % hydrogen, and 55.1 % oxygen by mass. A…

A: Given data,Percentage of C=41.4%Percentage of H=3.47%Percentage of O=55.1%Moles of compound…

Q: 5.) Ethylene glycol is a coolant widely used in automobiles. If its molecular formula is C2H6O2, how…

A: Number of moles is defined as the amount of the substance divided by the molecular weight of the…

Q: How many moles of atoms are contained in the following? (a) 25.0 g NaOH                  (b) 44.0…

A: Mass of NaOH = 25.0 grams Molar mass of NaOH = Atomic Mass of Na + Atomic Mass of O + Atomic Mass of…

Q: Two hypothetical ionic compounds are discovered with the chemical formulas XCI2 and YCI2, where X…

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Q: A chemical compound has a molar mass of 136.63 g/mol. How much would 2.46x 1022 molecules of this…

A: We know that,                1mole=6.023 x 10^23 molecules Also we knows,     1mole=molar mass of…

Q: A 5.000 gram sample of MnB4O7·•8H2O is heated to drive off the water. What is the mass of the…

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Q: Washing soda (Na2CO3!xH2O), a compound used to prepare hard water for washing laundry is a hydrate.…

A: Some ionic compound (salt) contains a water molecule in their crystal lattice structure. The water…

Q: Gibberellic acid, C19H22O6, is used to promote plant growth, particularly in seedlings. How many…

A: Avogadro's  number gives the number of atoms, molecules or ions in one mole of the substance and it…

Q: One molecule of an unknown compound is found to have a mass of  4.61 x 10-22 g. What is the molar…

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Q: What is the molecular formula of a compound given the molar mass of the compound is 62.15 g/mol and…

A: Molecular formula of compound determine actual number of atoms present in the compound and can be…

Q: 1. How many moles are in each of the given samples? a) 2.50 mL of water (assume density of water is…

A: Note : As per our guidelines we are supposed to answer first 3 parts .please resubmit the other…

Q: Which of the following contains the greatest number of molecules? A. 1 g of CH3CI В. 1 g of CH,Cl2…

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Q: How many molecules are contained in each of the following? (a) 9.6 mol C2H4              (c) 23.2 g…

A: Here given some sample as follows,(a) 9.6 mol C2H4 ,(b) 2.76 mol N2O, (c) 23.2 g CH3OH, (d) 32.7 g…

Q: How many grams of carbon can be obtained from 127 g of DEET ?

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Q: A 3.0 g sample of unknown hydrocarbon is prepared for combustion analysis. After the hydrocarbon…

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Q: An unknown compound is comprised of 25.9% N and 74.1% O. The molecular mass of the compound is 216…

A: % of N = 25.9 % of O = 74.1

Q: A combustion analysis is performed on a compound that contains only C and H. The analysis produces…

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Q: How many grams of Fe3+ are present in 4.66 grams of iron(III) chromate?

A: The molecular formula of iron (iii) chromate Fe2(CrO4)3. Molar mass of iron (iii) chromate = 459.67…

Q: How many atoms of C are present in 22.3 g of C?

A: