A chemical compound is analyzed for its elemental composition, and is found to contain 57.14% carbon, 4.80% hydrogen, and 38.06% oxygen.  The empirical formula for this chemical compound is:   A. C2H2O   B. CH2O   C. C2H4O   D. C2H4O2   E. C4H6O

Q: 21. A compound contains 70.6% carbon, 5.9% H, and 23.5% O by mass. The molecular weight of this…

A: Molecular formula of a compound tells the number of different atoms present in the compound.…

Q: Caproic acid, which is responsible for the foul odor of dirty socks, is composed of C, H, and O…

A: Since you have posted questions with multiple sub-parts, we are entitled to answer the first 3 only.…

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

A: First calculate percentage ratio  of mole then form formula

Q: Find the number of moles of the indicated element a) 9.75 g of B2O3 b) 187.2 mg of Na2B4O7 . 10H2O…

A: Given data is as follows: (a) The mass B2O3 given = 9.75 g The moles of substance can be calculated…

Q: How many moles of oxygen are in 6.75 grams of oxygen?     A. 0.42 moles B. 1.60 moles C. 0.21 moles…

A: Given  values are, Mass of oxygen = 6.75 g We know molar mass of oxygen O2 = 31.998g/mol

Q: 0.4 moles of calcium carbonate contains how many carbon atoms?     A. 1.2 x 1023   B. 4.8 x…

A: The formula of calcium carbonate = CaCO3  Molecular weight of CaCO3 is 100 gm/mol  1 mole CaCO3 =…

Q: The molar mass for F e (C O 3 ) is: A. 251.4 grams/mole B.115.8 grams/mole C.139.8 grams/mole D.83.8…

A: We have given that  The molar mass for Fe(CO3) is: A. 251.4 grams/mole B.115.8 grams/mole C.139.8…

Q: What is the molar mass (in kg/mol) of methane (CH4)? 1 6 H 1.008 12.00 7. 0.01701 kg/mol 0.01564…

A: Molar mass of a substance is basically the sum of total mass of all the atoms to make a mole of that…

Q: 0.6 moles of strontium phosphate contains how many oxygen atoms?     A. 0.8 NA   B. 2 NA   C.…

A: Answer: Molecular formula of Strontium Phosphate: Sr3(PO4)2

Q: 2. A compound composed of carbon and hydrogen with the formula CxHy was burned. The balanced…

A: The reaction is,  2CxHy +13O2--->8CO2 + 10 H2O Now we have to divide above equation by, 2 we get,…

Q: 7.50 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have…

A: Mass of the given compound us 7.50 g and molar mass of given compound is 128 g/mol. Here we have to…

Q: 3. It is found a certain sample of a compound contains 23.0g of sodium and 35.5g of chlorine. a.…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: A snowflake contains 1.9 X 10 ¹⁸ molecules of water. Home many moles of water does it contain?

A:

Q: What is the empirical formula for the compound made from Y3+ and Cl? Select one: a. YCI3 b. Y3CI c.…

A: Empirical formula is simple whole numbered ratio of atoms present in compound.

Q: 1. A 4.24mg sample containing only Carbon, Hydrogen, and Oxygen was burned and produced 6.21 mg of…

A: Given  Total mass of sample = 4.24 mg mass of CO2 = 6.21 mg mass of H2O = 2.54 mg (a) Moles of C…

Q: Which would contain 9.03 × 1023 oxygen atoms? Avogadro Constant = 6.02 × 1023. 3.0 mol H2O   0.75…

A: This problem can be solved by knowing that one mole of substance consists of 6.022×1023 particles.

Q: A compound contains 0.01293 moles of V and 0.03325 moles of Cl.  Calculate the ratio of moles of Cl…

A: Record the given data, The number of moles of compound V = 0.01293 moles The number of moles of…

Q: sample of a salt wasfound to contain 2.83 g of calcium and 2.68 g of fluorine. a) Calculate the…

A: Mass of calcium = 2.83g  Mass of fluorine = 2.68 g  Total mass of salt = mass of Ca + mass of F =…

Q: A 23.0 g sample of a compound contains 12.0 g of C, 3.0 g of H, and 8.0 g of O. Which of the…

A: Mass of sample = 23.0 g Carbon = 12.0 g Hydrogen = 3.0 g Oxygen = 8.0 g

Q: A compound containing carbon, oxygen, and hydrogen was found to have an empirical formula of CH,0.…

A: Empirical Formula is CH2O Formula mass of CH2O = 1 x Atomic mass of C + 2 x Atomic mass of H + 1x…

Q: MOLAR VIEW T03/S11 If a sample of (NH4)2HPO4 is found to contain 3.79 mol of NH4* ions how many…

A: The reaction can be written as follows: (NH4)2HPO4→2NH4++HPO42-

Q: Complete the following question, showing your work, including a complete BCA table. 4.5 moles PF3 =…

A: Phosphorous trifluoride decomposes to form phosphorous and fluorine. Two moles of PF3 gives two…

Q: A sample of Al2(SO4)3 contains 11.2 g of oxygen, find the number of moles of Al2(SO4)3   0.0979 mol…

A: The molar mass of an element can be defined as mass in grams of 1 mole of that substance. It is…

Q: Convert 22.89 grams of X3Z4 into moles of the same compound. Assume that the molar mass of X is…

A: Given, Molar Mass of X = 72.43 g/mol Molar mass of Z = 11.84 g/mol Mass of X3Z4 = 22.89 g  Moles  =…

Q: 2AI+3H2SO4=AI2(SO4)3+3H2 How many grams of aluminum sulfate would be formed if 250g H2SO4 completely…

A: 2Al + 3 H2SO4 →Al2(SO4)3+ 3H2 Mass of H2SO4 reacted = 250 g Molar mass of H2SO4 = 98.08 g mol-1…

Q: Calculate the number of LiLi atoms in 8.5 moles of LiLi.   Express your answer using two significant…

A: Answer:- This question is answered by using the simple concept of calculation of number of atoms…

Q: How many grams of aluminum are present in a 4.04 g of aluminum iodide, Ali3

A: Given,  Mass of Aluminium iodide = 4.04 g  Molar mass of AlI3 = 407.695 g/mol

Q: Using the equation 2S2O3^2-(aq)+I2->S4O6^2-(aq)+2 I^-(aq), determine the number of moles of I^-…

A: From the balanced chemical equation  2S2O3^2-(aq)+I2->S4O6^2-(aq)+2 I^-(aq)

Q: Copper(I) iodide (CuI) is often added to table salt as a dietary source of iodine. How many moles of…

A: The mass of copper (I) iodide (CuI), mCuI, in 1.00 lb or 454 g of table salt is;…

Q: Freon is a trade name for a group of gaseous compounds once used as propellants in aerosol cans.…

A: We will have to calculate the percentage of chlorine by mass in the given compounds. For that, we…

Q: A sample of a compound containing only S and Cl contains 2.72g S and 6.04g Cl.  Another sample of…

A: A sample of a compound containing only S and Cl contains 2.72g S and 6.04g Cl. Another sample of the…

Q: Tennantite is an ore of copper with the formula Cu12As4S13. How many moles of copper are present in…

A: Number of atoms, ions and molecules present on a given amount can be determined by “Mole Concept”.…

Q: A compound contains 0.01238 moles of V and 0.02341 moles of Cl. Calculate the ratio of moles of Cl /…

A: A compound contains 0.01238 moles of V and 0.02341 moles of Cl. We have to calculate the ratio of…

Q: 3. The average atomic mass of an atom is expressed in c. g/mol d. moles a. grams b. amu 4. Which…

A: The answer to the given question is as follows------------- The number of moles (n) = Mass (W)/Molar…

Q: For the chemical reaction, Fe2O3 + 3 SO3 à  Fe2(SO4)3, calculate the number of moles of SO3 you will…

A: Given :-  Fe2O3 + 3 SO3 →  Fe2(SO4)3  number of moles of Fe2O3 = 6.45 mol  To calculate :-  number…

Q: Find the number of moles of the indicated element a) 9.75 g of B2O3 (B) b) 187.2 mg of Na2B4O7 .…

A: A numerical problem based on mole concept that is to be accomplished.

Q: Which of the following compounds contains the largest number of atoms?

A: 1 mol = 6.022 × 1023  atoms   We can calculate moles of each atom in a mole of compound. For example…

Q: How many oxygen atoms are in 1.50 mol of SO3?

A: Mole is a unit of quantity of substance. One mol of a substance contains 6.022 x 1023 units of that…

Q: 11. A compound was found to contain 59.9% C, 8.06% H, and 32.0% O by mass. What is the empirical…

A: Given the precentage composition by mass of carbon, hydrogen and oxygenin a compound.we are asked…

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: 30. A sample of a compound containing only S and Cl contains 2.72g S and 6.04g Cl. Another sample of…

A: given data = a sample compound only containing S and Cl S = 2.72 g, Cl = 6.04 g another sample of…

Q: How many moles of calcium atoms do you have if you have 8.20 * 10 ^ 21 atoms of calcium. (The mass…

A: In 1 Mole of any substance, we have 6.023*1023 atoms of that substance.

Q: 2 Al + 3 H,SO, 6. How many grams of hydrogen gas are produced with 0.88 moles of aluminum sulfate? 3…

A: We can determine the mass of Hydrogen gas produced from the balanced equation.  The balanced…

Q: a. Calculate the molar masses of these two compounds(CH2FCF3 and CHClFCF3). b. What is the percent…

A: a) This question asks us to find the molar mass of two compounds given. b) Percentage composition…

Q: 3) A different compound contains only sulfur and fluorine.a sample of the cmpound 3.859 g of…

A: 1) Moles of Sulfur (S) needs to be determined in the compound containing 3.859g sulfur and 8.874g of…

Q: A sample of Al2(SO4)3 contains 11.2 g of oxygen, find the number of moles of Al2(SO4)3   0.0740 mol…

A: Given,  Sample of Aluminium sulphate Chemical formula of Aluminium sulphate = Al2(SO4)3 Mass of…

Q: 2.20 Fluorite, a mineral of calcium, is a compound of the metal with fluorine. Analysis shows that a…

A: Mass percent is a method of expressing concentration of the solution.   amount of substance present…

Q: a. 1.25 moles of aluminum chloride ). 3.35 moles of sodium hydrogen carbonate C. 4.25 millimoles of…

A:

Q: 1. How many grams of B are present in 1.31 grams of boron trifluoride ? grams B. 2. How many grams…

A: The number of moles of an element is mathematically expressed as given below: where: n, m, and M…

Q: Aspirin, C9H8O4, is a common pain reliever and is also often given in low doses daily for prevention…

A: Given,  Moles of aspirin ( C9H8O4) sample = 0.0745 mol.  The mass of aspirin in the sample is:

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".