· Calculate the molar mass of each of these compounds and the mass percent of each element. a) PbS, lead(II) sulfide, galena

Q: 16. The mineral enargite is 48.41% Cu, 19.02% As, and 32.57% S by mass. What is the empirical…

A:

Q: 1. Calculate the mass in grams of a single oxygen molecule, 02.

A: Molar mass of O2 is 32.0 g/mol  We have to calculate here mass of 1 molecule of oxygen i.e. O2

Q: What is the mass grams that are in 6.70 x 1025 molecules of 1,?

A:

Q: CxHyOz

A:

Q: A student, Ken, is given a mixture containing two carbonate compounds. The mixture includes MgCO,…

A: Given,

Q: A compound has a molar mass of 95 g/mol. The compound is KF 02 MgCl2 O SF2

A:

Q: Symbol mass moles Number of atoms Fe 354 g potassium 302 g silver 2.16 x 1024

A: Number of moles = mass ÷ molar mass Number of atoms in 1 mol = 6.022 x 1023

Q: Calculate the mass of 2.50 moles of Carbon Monoxide, CO. ______

A:

Q: A materials engineer has filed for a patent for a new alloy to be used in golf club heads. The…

A: The minimum composition of elements is as follows: Mn=25%Al=6.3%C=0.65%Cr=5.5% The maximum…

Q: If a sample of Fe2S3 contains 1.25x10^15 iron atoms what is the mass in grams ?

A:

Q: Calculate the theoretical mass percent of barium in BaCl2∙2H2O.

A:

Q: Calculate the mass (in kilograms) of chlorine in 25 kg of each chlorofluorocarbon (CFC). a. CF,Cl2…

A: Solution-  mass of the clorine in the CF2Cl2-=molar mass of colorinemolar mass of the…

Q: What is the empirical formula of a compound with the following mass percentages of carbon, hydrogen…

A:

Q: 1. a. What is the empirical formula of a compound with the following mass composi- tion: 40.92% C…

A:

Q: The mass of 5.20 moles of glucose, C6H12O6 is

A:

Q: Question attached

A: Number of moles of the substance is equal to the ratio of mass to the molar mass of the substance.…

Q: What is the empirical formula of a molecule containing 65.5% carbon, 5.5% hydrogen, and 29.0%…

A:

Q: 2. A 13.07g sample of an unknown compound is composed of 9.48 g of barium, 1.66g of carbon and 1.93…

A: Empirical formula of a compound is denoted by the proportion of numbers of atoms present in the…

Q: A mixture consisting only of lithium chloride, LiCl, lithium carbonate, Li2CO3, and lithium nitrate,…

A: Introduction to Elemental Analysis In the process of elemental analysis, a sample of a substance…

Q: A sugar crystal contains approximately 1.8x1017 sucrose (C12H22O11) molecules. What is its mass in…

A:

Q: How many oxygen atoms are in 1.70 g of quartz?

A: The chemical formula of quartz is SiO2. The formula mass of SiO2 is 60.08 g. The number of moles (n)…

Q: Question attached

A: The given compound is C4H10, butane. mass of 4 C  = 4 mol x 12.01g/mol = 48.04 g mass of 10 H = 10…

Q: 20)A 10 g sample of which substance contains the greatest number of hydrogen Atoms? 

A: [A.] 10 g of PH3  Molar mass of PH3 = 33.997 g/mol  Number of moles of PH3 = 10 g / 33.997 g/mol  =…

Q: 1) How many moles of cobalt (Co) atoms are there in 6.00 X 10 (6 billion) Co atoms? 2) How

A: We know, 1 mols = 6.022x1023 atoms

Q: Arrange the following substances in order of increasing mass percent of carbon. a. caffeine.…

A:

Q: the mass, in grams, of 112 atoms of iron, Fe (1 mol of Fe has a mass of 55.85 g).

A:

Q: Calculate the percentage of nitrogen, by mass, in Ca(NO3)2.

A: Assuming we have 1 mole of Ca(NO3)2. => mass of Ca(NO3)2 we have = molar mass of Ca(NO3)2 = 164 g…

Q: Calculate the percentage of potassium, by mass,in K2PtCl6.

A: Mass percent of the solution is defined as the mass of solute divided by the mass of solution…

Q: Q9. Nitrogen is a highly reactive element and has many forms of oxides and nitrogen content of these…

A:

Q: %3D The mass of 2.21 x 1040 atoms of iron (molar mass = 55.845 g/mol) is O 2.78 x 104 g. 2.05 x 102g…

A:

Q: Find the mass (in grams) 8.8 X 1023 molecules of NO,

A:

Q: Calculate the mass of tetraborane (B,H10) that contains a billion (1.00 × 10´) hydrogen atoms.

A: Given : number of hydrogen atoms = 1.00 X 109  Since 1 molecule of B4H10 has 4 B atoms and 10 H…

Q: 2. A hydrocarbon was found to be 20% hydrogen by mass. If the molar mass is 30 g/mol, what is the…

A: Note : As per our guidelines we are supposed to answer first question. Please repost the other…

Q: A compound used to generate Oxygen gas in the laboratory has mass composition of 31.91% K, 28.93%…

A:

Q: If a laboratory analysis of the mineral aegirine yields 10.0% Na, 24.2% Fe, 24.3% Si, and 41.5% O,…

A:

Q: Calculate the mass percent of each element in ZnCI2 ?

A: Mass percent of element =Mass of element in the compoundMolecular mass of compound​X100 Atomic mas…

Q: 1. How many moles would contain 12.0 g of P ? 2. Find the mass (in grams) 7.7 X 1023 molecules of…

A: 1. Given values , Mass of P= 12.0 g Molar mass P= 30.973762 g/mol

Q: 2.845 x 1012 potassium ions equals how many moles of potassium ions?

A: 1 mol of potassium ions equal 6.022 ×1023ions    16.022×1023moles of potassium ions equal 1 ion

Q: You are given 1.0g samples of Iron (Fe), Silicon (Si), and Lithium (Li). Which of the three samples…

A: Applying mole concept and avogadro concept.

Q: 8. An explosive has the following composition by mass: 15.87% Carbon, 2.22% Hydrogen, 18.5% Nitrogen…

A: Given : Molecule which contains only H, C, N and O. Mass percent of C = 15.87 % Mass percent of H =…

Q: How many oxygen atoms are in 2.40 g of quartz?

A: quartz :  molecular formula = SiO2 molecular mass = 28 + (2 x 16) g/mol                            =…

Q: 10) What is the mass in grams of 0.852 moles of ferric oxide (Fe,O,) ? A) 136 g B) 17 g C) 5.34 x…

A: Number of moles = 0.852 mol

Q: 6. The mineral enargite is 48.42 % Copper. 19.02 % arsenic and 32.57% sulfur by mass. What is the…

A:

Q: 1. What is the percent, by mass, of chromium in KCrO4? a. 26,776 % b. 31.763 % c. 40.268 % d. 42.241…

A:

Q: Capsaicin, the compound that gives the hot taste to chili peppers, has the formula C18H27NO3.(a)…

A: The molecular formula of capsaicin is C18H27NO3.

Q: What is the mass percent of chlorine in NH4Cl?

A: First, find the total mass of NH4Cl.NH4Cl = 54g/mol

Q: 2. Determine mass (in g) of CO that contains 5.50 x 108 atoms

A:

Q: Small amounts of platnium are used in automotive spark plugs. What is the mass, in grams, of 3.21 x…

A: Since moles = number of atoms / Avogadro's number  And Avogadro's number = 6.022 X 1023  And moles…

Q: Calculate the mass percentage of chlorine in trichlorobenzene, C6H3Cl3.

A:

Q: Thiophene is a compound composed only of carbon, hydrogen, and sulfur. It is 57.10% C, 4.79% H, and…

A:

Mass Spectrometry

This process is an instrumental method in which a sample is changed to fast moving positive ions by electron bombardment. The charged particles vary due to their different mass to charge ratio and are estimated with the help of this difference. It is also called mass spectroscopy.