A 1.58 mole sample of a pure unknown substance has a density of 1.87 g/cm3. If the sample occupies a volume of 188. cm3, what is the identity of the substance in the samples? Element Molar Mass Cadmium 112.411 Francium 223.02 Barium 137.327 Terbium 158.925 Molybdenum 95.95 Terbium Molybdenum Cadmium Francium Barium

Q: A 19.00 kg sample of an unknown compound contains 0.06 kg of hydrogen, 11.01 kg of gold, 7.93 kg of…

A: Percent composition of any element in a compound is given by the following expression        percent…

Q: The formula for disulfur decafluoride is S2F10 . a. How many molecules are in 1.57 grams of disulfur…

A: a) Given: 1.57 g of S2F10. The no of molecules are determined as follows,

Q: Question 8: For sugar (C12H22011), what is the percentage of carbon, hydrogen and oxygen in the…

A: 8.  molecular formula of sugar = C12H22O11 Number of oxygen atoms in Sugar = 11 Number of carbon…

Q: An ionic compound MX3 is prepared according to the following unbalanced chemical equation.   M  +…

A: The number of moles of X2 (nX) is calculated using equation (1) in which N is the number of…

Q: Be sure to answer all parts. How many total moles of ions are released when the following sample…

A: To solve this problem we have to calculate the number of moles.

Q: A particular ore of lead, galena, is 10.0% lead sulfide, PbS, and 90.0% impurities by weight. What…

A: we  need to calculate mass of Pb in the ore

Q: other elements. alyzeu P₁, A similar analysis is made of three other substances that also only…

A: We are given Composition of Sample X (pure substance) comprising of Element E1 and element E2  We…

Q: How many barium ions are contained in 725 g of Ba3(PO4)2? Molar mass of Bag(PO4)2 is 601.93 g/mol. O…

A:

Q: What mass of SbF3 (179g x mol^-1) is needed to produce 1.00 g of Freon-12, CCl2F2 (molar mass =121 g…

A: We have chemical balanced equation of Freon-12 from SbF3 . We have to calculate the amount of SbF3…

Q: 4) Nicotine, the stimulant in tobacco, causes a very complex set of physiological effects in the…

A: From the amount of CO2, H2O and N2 formed, we find out the amount of C, N and H present in the given…

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: 1. Which statement best describes molar mass? a. the mass of 6.02 x 1023 atoms, which is constant…

A: The molar mass of a compound is described by the moles concept. According to this concept, one molec…

Q: A balanced chemical equation contains the term "2Ba(OH)2 8H2O." How many atoms of each element does…

A: Given: The coefficient of Ba(OH)2·8H2O in the reaction = 2

Q: Predict the element that will have the highest mass percent composition in each compound without…

A: a. Given: C3​H6​O;MC​=12.01g/mol;MH​=1.01g/mol;MO​=16.00g/molStep 1: Solve for the molar mass of the…

Q: Compound X2Z contains 32.2% X by mass. What mass of the compound contains 36.7 g X?

A:

Q: Given Mass of unknown sulfate = 0.4213 g Mass of empty crucible and cover = 17.6519 g Mass of…

A: The given reaction is represented as follows: BaCl2+H2SO4 → BaSO4+2HCl

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: The fuel used in many disposable lighters is liquid butane, C4H10. Butane has a molecular weight of…

A: Molar mass of any element is equal to the atomic mass of that element in the unit of grams. Molar…

Q: While cleaning out an old shelf in the lab, a chemist discovered a bottle labeled "HIGHLY TOXIC".…

A:

Q: 4) A 5.416 g sample that contained NaCl and BaCl2 2H₂O was heated. After heating the sample had a…

A: “Since you have posted a multiple questions we will solve the first question for you. To get the…

Q: Which formula shows the correct way to calculate the molar mass of the compound - Magnesium…

A: Molar mass of a compound is the mass of 1 mol of compound . Molar mass of a compound can be…

Q: 719.03 g 35.00 mL 708.4 mol 0.67 L 2.09476 mol L x 3.95 L H = 0 mL mol mol

A: Rule for significant digits in multiplication and division.The answer should have the same number of…

Q: The chemical formula of trinitrotoluene (TNT) is C7H5N3O6. What is the molecular mass of TNT?…

A: We have to find the molecular mass of trinitrotoluene (TNT) is C7H5N3O6. Atomic mass of Carbon =…

Q: Mass of Zn 2.44 g Mass of Cu 0.063 g The mass of Zn and the mass of Cu in a coin are given in the…

A:

Q: What is the mass in grams of 1.15 x 10^24 atoms of manganese?

A: 1 mol Mn has mass equal to  59.94 g  1 mol Mn = 6.022 × 1023  atoms of Mn

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

A:

Q: What is the elemental composition of mercury(I) nitrate, Hg2(NO3)2? Report the mass percent of each…

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

Q: A scientist is trying to discover information about an unknown metal in a compound. The formula for…

A: 1- First calculate the moles of compound XBr3  moles of XBr3 = ( moles of Br ) / 3  moles of XBr3 =…

Q: D. Calculate the mass (g) of the following samples. 25) 238 moles of lead 26) 1.54 x 10° moles of Zn…

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

Q: Determine the moles of barium in each sample. Be sure each of your answer entries has the correct…

A: Part 1) 731. g Ba:To find the number of moles of barium, we'll divide the given mass by the molar…

Q: A student, Ken, is given a mixture containing two nitrate compoundsnitrate compounds. The mixture…

A:

Q: mass

A:

Q: A compound has a molar mass of 123.22 g/mol. What is the molecular formula of a substance that has…

A:

Q: Zinc Oxide decomposes into zinc and oxygen. If 52.1 g of zinc oxide decomposes to form 41.8 g of…

A: Given,52.1 g of zinc oxide, 41.8 g of zinc.The balanced chemical reaction of decomposition of zinc…

Q: 12. The complete combustion of acetylene (C₂H2) is described by the following reaction: C,Hz + Oz →…

A: Q.12 The given equation of combustion of acetylene is: C2H2+O2→CO2+H2O

Q: Write the chemical formula for each compound, and then calculate the amount in moles in each sample.…

A:

Q: An empirical formula will not provide the following information 1. lowest whole-number ratio of…

A: Empirical formula : Empirical formula is the lowest or simplest  ratio of the atoms present in the…

Q: What is the mass in grams of 7.94 x 1015 molecules of CS,?

A:

Q: Determine the empirical formula of a compound containing 40.6 grams of carbon, 5.1 grams of…

A: Given that -  Mass of Carbon = 40.6 g  Mass of Hydrogen = 5.1 g  Mass of oxygen = 54.2 g  Molar mass…

Q: Maggie filtered out a sample of copper (II) chloride, CuCl2 from a local pond, and found its mass to…

A:

Q: A compound has an empirical formula of HgCl. If the molecular mass of the compound is 472.2 g/mol,…

A: Here we are required to find the molecular formula.

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".