1.a) A 0.0430-g sample of silver [Ag] metal is heated in a sulfur [S] atmosphere forming 0.0494 g of silver sulfide ionic compound. Calculate the empirical formula of the silver sulfide?     1.b) What is the percent by mass of the silver and sulfur in the sample?

Q: Cyanocobalamin( vitamin B12) contains 4.34% cobalt by mass. what is the ,olar mass of…

A:

Q: Sea salt is formed by natural evaporation of ocean water and contains 98% sodium chloride. The…

A: Mass of sodium Chloride can be calculated as :

Q: 5. Analysis of 20.0 g of a compound containing only calcium and bromine indicates that 4.00 g of…

A: Given, The mass of a compound is 20.0 grams The mass of the calcium in the compound is 4.00 grams

Q: How many carbon atoms are in a diamond (pure carbon)with a mass of 38 mg?

A: The mass of diamond is 38 mg The molar mass of carbon is 12.01 g mol-1

Q: Which does NOT describe a mole?A. a unit used to count particles directlyB. Avogadro’s number of…

A: Mole is an SI unit used to measure the amount of the substances present. One mole of the substance…

Q: Q;) a compound is found to contain 40 % carbon, 6.7 % hydrogen, and 53 % oxygen by weight. What is…

A: Answer:- this question is answered by using the simple concept of calculation of epirical formula…

Q: 1. a.) How many moles of sodium in 0.46g of sodium? b.) How many atoms of sodium are in 0.46g of…

A: The number of moles (n) of a substance can be calculated as: n=Given massMolar mass······(1) One…

Q: If a sample of barium hydroxide has a mass of 5.190 g, determine the number of moles of the compound…

A:

Q: In a 6.43E1 g sample of NaHCO, how many grams of sodium are present? Use two decimal places in…

A: Mass of NaHCO3 = 6.43E1 = 64.3 g

Q: Use ammonia (NH3) to explain what is meant by thepercent composition by mass of a compound.

A: Ammonia was used to show, what is meant by percent composition by mass of a compound has to be…

Q: A white oxide of tungsten is 79.2976% tungsten by mass. A blue tungsten oxide also contains…

A: Let the mass of the white tungsten oxide and the blue tungsten oxide be equal to 100 g. Mass of…

Q: An unknown compound containing tellurium and bromine is analyzed and it is determined that 28.53% of…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: A 5.41g sample of carbon reacts with hydrogen to form 6.32g of an organic compound. What is the…

A: Empirical formula is written using simplest ratio of elements present in the compound but not the…

Q: Consider a sample of calcium carbonate in the form of a cubemeasuring 2.005 in. on each edge. If the…

A: Given: Edge length of the cube(Calcium carbonate) =2.005 inch Density of sample= 2.71 g/cm3 To…

Q: What mass of ammonia gas (NH3) contains 2.8*10^24 hydrogen atoms?

A:

Q: Find the percentage of mass of sodium (Na) in Na2s if it is 32.1%  sulfur (s) by mass.

A: The percentage of mass of an element in a compound is calculated by the formula,

Q: Find the empirical formula of a compound, given that the compound is found to be 47.9% zinc and…

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

Q: A sample contains 0.687 mol H3PO3. What is the mass of H3PO3in the sample?

A: Given that, Moles of H3PO3 = 0.687 mol  Molar mass of H3PO3 = 82 g mol-1 Then,

Q: A 57.00g sample is composed of 69.61% Barium, 6.093% Carbon, and 24.28% Oxygen. What is the…

A: Empirical Formula  of the compound is BaCO3

Q: How many MOLES of dioxygen difluoride are present in 4.95×1022 molecules of this compound ?

A: We have to calculate the moles of dioxygen difluoride .

Q: What is a MOLE? O Aunit of substance containing a certain amount expressed in grams O Aunit of…

A: The given question asks to select the right option that accurately defines a mole of any substance.

Q: completely

A:

Q: In the compound (NH4)S2, what is the percent composition of hydrogen

A:

Q: 0.933 g sample of Nickle metal is heated in the presence of nitrogne gas forming 1.081 grams of a…

A: In this question, we want to determine the moles of Nitrogen gas. How we can determine, you can see…

Q: Researchers from the University of Cape Town in South Africa have discovered that penguins are able…

A: Since the chemical is only composed of Carbon, hydrogen and sulfur  hence we can assume its…

Q: Oxygen makes up 46.7% by mass of the earth's crust. How many grams of oxygen are present if a sample…

A: Given that, 46.7% by mass of the crust of earth is made up of Oxygen. It implies that every 100 g of…

Q: A chemical reaction was used to produce 1.61 moles of copper (II) bicarbonate, Cu(HCO3)2. What mass…

A: Given data:

Q: An unknown compound containing tellurium and bromine is analyzed and it is determined that 28.53% of…

A: According to given data%mass of Tellurium in compound=28.53 %and% mass of Bromine in compound=71.47…

Q: A chemist has one mole of an unknown molecule. The mass of this sample is 184.1 grams. After doing…

A: Given: Mass of 1 mole of molecule = 184.1 g. And the molecule has the formula XBr2.

Q: what is the empirical formula of a compound found to contain 52.13 % carbon, 13.15 % hydrogen, and…

A: Given : Mass percent of C = 52.13 % Mass percent of H = 13.15 %  And mass percent of O = 34.72 %…

Q: Analysis of a sample showed that it contained 68.3% lead, 10.6% sulfur, and 21.1% oxygen. What is…

A:

Q: A compound contains carbon, hydrogen, and nitrogen as its only elements. A 9.353 g sample of the…

A: Given that the mass of C and H in a compound of mass 9.353 g is 5.217 g and 1.095 g respectively.

Q: in the laboratory, a student weighs out 0.0852 g of cobalt on balance. how many atoms of cobalt are…

A: We have 0.0852 g of Co , we have to calculate the atoms of cobalt in the sample.

Q: The nerve agent Tabun (GA) has the formula C5H11N2O2P. It is one of the lethal chemical compounds…

A: Given information: Mass of tabun = 975 mg

Q: In one of your experiments, you made magnesium oxide by burning magnesium in the air. How much Mg is…

A: Magnesium reacts with oxygen to make a compound called magnesium oxide. The bright light results…

Q: A sample of a compound containing only magnesium and oxygen is found to have 194g Mg and 256 g of O…

A: The percentage of Magnesium and oxygen are calculated as,

Q: The mineral pyrolusite is a compound of manganese and oxygen. If 63.19% of the mass of pyrolusite is…

A: The empirical formula of a chemical compound is the simplest positive integer ratio of atoms present…

Q: The number of particles in 1 mole is called ? b) The value of the mole is equal to the number of…

A: No of particles = mole × avagadro number.   Mass = molar mass × mole.

Q: 1. How many atoms is 6.00 mole of sodium? 2. Convert Ó.024 mole to formula units of table salt. 3.…

A: Since you have posted questions with multiple subparts we will solve the first three subparts for…

Q: 2. How many molecules are present in 15.47 g of acetic acid?

A:

Q: 2a Calculate the formula mass of Mga(PO.)2 2b Use dimensional analysis to convert 1.75 mol Mgs(PO4),…

A: Formula mass of Mg3(PO4) 2 = 3 ( Atomic mass of Mg) + 2 ( Atomic mass of P + 4(Atomic mass of O) )…

Q: Graphite, one form of carbon, is a powdery black solid used to make pencil lead.  A speck of…

A: Graphite powder is equivalent to carbon.

Q: What is the percent composition by mass (to one decimal place) of copper in 80.0 kg of copper (2)…

A: Molar mass of Copper(II) pho sphate = 380.58 g/mol This implies; 380.58 g of Cu3(PO4)2 contains…

Q: How many grams of the insecticide calcium chlorate must be measured if a sample is to contain 5.79 g…

A: Formula of calcium chlorate = ca(clo3)2 Molecular mass of calcium chlorate is 207g

Q: formula of the hydrate

A: When a hydrous salt is heated, it loses the water of crystallization. Water of crystallization =…

Q: 7. A compound contains 30.4 g of nitrogen and 69.6 g of oxygen by mass. What is the chemical formula…

A:

Q: Ammonium nitrate (NH4NO3), a common fertilizer, id 35.0% nitrogen by mass. How much ammonium nitrate…

A: We have to calculate the amount of Ammonium Nitrate.

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.